Of the 19 core islands that can be seen on a Galapagos Island map and make up the Galapagos Archipelago, 14 have visitor-accessible sites. Interestingly, the waters surrounding these islands are some of the most nutrient-rich waters in the world thanks to five different ocean currents that flow through them. These waters make up the UNESCO World Heritage-listed Galapagos Marine Reserve. So, you can imagine how amazing this location is to explore on land, at sea, and even underwater!
The total land area of the Galapagos’ islands—including the archipelago’s islets and rocks—is estimated to be about 3,093 square miles (or 8,010 square kilometers). The overall ocean area that encompasses this incredible destination is estimated to be around 23,000 square miles (59,500 square kilometers), according to Britannica.
How were the Galapagos Islands formed?
The Galapagos Islands are unique in many ways, even from island to island. This is partially because of how the islands formed. Over the course of millions of years, oceanic volcanic activity resulted in magma coming up through cracks in the crust, hardening into layers and layers of rock. Incidentally, there are a couple of islands that are technically not done forming! Those include Isabela and Fernandina. You can spot these on a Galapagos Island map.
Now, the archipelago is renowned for its distinctive biodiversity. It is home to around 20 endemic reptiles, 6 endemic seabirds and 22 endemic landbirds, 2 endemic marine mammals, and countless more native and endemic fish, plants, terrestrial invertebrates, land mammals, and vascular plants. When you add to this all the other native species… well, you begin to understand why this destination is so special. Also, each island in the Galapagos has its own combination of native and endemic species.
Overview of Main Islands and Islets of Galapagos
Of the 13 major islands and six smaller islands of the Galapagos, the most significant ones include: Isabela, the largest of the Galapagos Islands and home to six volcanoes; Santa Cruz, which is centrally located and home to the Charles Darwin Research Station, serving as a central hub for tourism and conservation efforts; San Cristóbal, the political capital of the archipelago and the site where Charles Darwin first landed in 1835; Floreana, one of the earliest inhabited islands, and the backdrop to stories of pirates, whalers, and mysterious disappearances; and Fernandina, the youngest and most volcanically active island, largely untouched by human presence and a crucial habitat for marine iguanas and flightless cormorants.
Several smaller islands and islets also play a vital role in the ecosystem. Española, the southernmost island (as you can see on a few of the Galapagos Island maps), is renowned for its endemic species, such as the waved albatross and colorful marine iguanas. Genovesa, often called “Bird Island,” is a haven for seabirds, including red-footed boobies and frigatebirds. Santiago features rugged lava formations and tide pools teeming with marine life. Bartolome is famous for its striking Pinnacle Rock, one of the most photographed landscapes in the Galapagos. North Seymour is a nesting-ground for blue-footed boobies and magnificent frigatebirds, while South Plaza is known for its vibrant red sesuvium plants and land iguana population. These islands and islets collectively form one of the most ecologically significant and diverse regions in the world, contributing to the Galapagos’ reputation as a living laboratory of evolution.
Here is an overview of 13 Islands in the Galapagos. See if you can locate them on one of our Galapagos Island maps.
Isabela Island
Isabela Island, the largest in the Galapagos archipelago, is distinguished by its vast size and unique seahorse-like shape. Formed by the merger of six major shield volcanoes—Alcedo, Cerro Azul, Darwin, Ecuador, Sierra Negra, and Wolf—it is one of the most volcanically active regions in the world. Notably, Wolf Volcano, the tallest in the archipelago, reaches an elevation of approximately 5,600 feet (1,707 meters) above sea level.
Isabela is home to the only species of penguin that lives north of the equator, the Galapagos penguin, as well as the largest number of giant tortoise subspecies, each adapted to different volcanic regions. The nutrient-rich waters surrounding the island, influenced by the upwelling of the Cromwell Current, sustain a vibrant marine ecosystem teeming with species such as sea lions, marine iguanas, manta rays, and at least 16 species of whales, including humpbacks and orcas.
Bartolome Island
Bartolome Island is one of the most iconic and visually striking islands in the Galapagos Archipelago, known for its dramatic volcanic landscapes and stunning panoramic views. This small island, located off the east coast of Santiago Island, features a barren, reddish-brown terrain formed by volcanic cones, spatter formations, and lava fields. Its most famous landmark, Pinnacle Rock, is a towering basalt formation that rises sharply from the sea. A hike to the island’s summit provides breathtaking views of the surrounding islands and the striking contrast between the turquoise waters and the volcanic terrain, making it one of the most photographed locations in the Galapagos.
Santa Cruz Island
Santa Cruz Island is the central hub of the Galapagos. While it is known for its diverse ecosystems, vibrant wildlife, and significant role in conservation efforts, it is also home to the largest human population in the islands. Its main town, Puerto Ayora, hosts the Charles Darwin Research Station, where scientists work to protect and rehabilitate endangered species like the Galapagos giant tortoise.
Visitors can explore attractions such as Tortuga Bay, a pristine white-sand beach famous for its marine iguanas and sea turtles, or the underground lava tunnels that showcase the island’s volcanic origins. Santa Cruz also serves as a gateway for exploring other islands in the Galapagos. When looking at a Galapagos Island map of Santa Cruz, note that there is port on the northern side of the island where it is separated from the island of Baltra (host to one of two Galapagos airports) by the Itabaca Channel.
Genovesa Island
Often referred to as “Bird Island,” Genovesa is renowned for its abundant birdlife and dramatic landscapes. Shaped like a horseshoe due to its collapsed volcanic caldera, the island features steep cliffs and a serene bay that invites exploration. Bird enthusiasts are particularly drawn to the large colonies of red-footed boobies, Nazca boobies, and great and magnificent frigatebirds that inhabit this island. Visitors can climb Prince Philip’s Steps for panoramic views or walk along Darwin Bay’s sandy beach, where sea lions and marine iguanas bask in the sun.
Fernandina Island
Fernandina Island, the youngest and most pristine island in the Galapagos archipelago, is a living testament to the power of volcanic forces. Dominated by La Cumbre volcano, one of the most active in the region, the island’s rugged landscape is shaped by frequent eruptions and lava flows. Despite its harsh terrain, Fernandina is home to the largest colony of marine iguanas, which can be seen basking on the black lava rocks. Flightless cormorants, Galapagos penguins, and sea lions thrive along the island’s shores, while mangroves provide shelter for diverse wildlife. With no introduced species, Fernandina offers a rare glimpse of an untouched ecosystem, making it one of the most ecologically significant islands in the Galapagos.
Santiago Island
Santiago Island is one of the most dynamic islands in the archipelago. It features a rugged volcanic landscape with black lava flows, pristine beaches, and tidal pools full of marine life. Santiago was once heavily impacted by introduced species like goats and pigs, which have since been eradicated to restore the island’s natural ecosystem. Visitors to Santiago can explore Sullivan Bay, famous for its striking pahoehoe lava formations, or Puerto Egas, where they can see lava grottos inhabited by fur seals and enjoy snorkeling with sea turtles and reef sharks.
Santa Fe Island
Santa Fe Island is one of the oldest in the Galapagos archipelago. It is a treasure trove of biodiversity and natural beauty. Its rugged, arid landscape is dotted with giant Opuntia cacti and Palo Santo trees, creating a unique habitat for species like the endemic Santa Fe land iguana. The island’s turquoise bay, surrounded by cliffs, is a haven for sea lions, while underwater, snorkelers can encounter rays, white- and blacktip reef sharks, tropical fish, and sea turtles.
North Seymour Island
North Seymour Island, a small but wildlife-rich gem, features vibrant bird colonies and rugged landscapes. The island’s rocky terrain and dry vegetation provide the perfect habitat for iconic species like blue-footed boobies and magnificent frigatebirds, whose males inflate their striking red throat pouches (gular sacs) to attract mates. Land iguanas roam the arid ground, while sea lions lounge along the rocky shores. A loop trail offers visitors close encounters with nesting birds and panoramic views of the surrounding ocean.
Española Island
Española Island is the Galapagos’ oldest island, a sanctuary of biodiversity, and a vital breeding ground for unique wildlife. This island is home to native and endemic species like the Española mockingbird, the vividly colored marine iguana, and the majestic waved albatross, which nests here. The island’s dramatic cliffs and sandy beaches, like Gardner Bay, host colonies of sea lions, while Punta Suarez offers visitors a chance to witness blowholes shooting seawater high into the air.
Floreana Island
Floreana Island, rich in history and natural beauty, is one of the most intriguing islands in the Galapagos archipelago. Known for its colorful past filled with tales of intrigue (see the “Galapagos Affair”, which tells the story of the disappearance of eccentric Baroness Eloise de Wagner-Wehrhorn and one of her lovers), Floreana also boasts unique wildlife and landscapes. Visitors can explore the iconic Post Office Bay, where travelers still leave letters in a wooden barrel, continuing a centuries-old tradition. The island is home to vibrant flamingo lagoons, nesting sea turtles, and the endemic Floreana mockingbird.
Rabida Island
Rabida Island is home to deep red sand beaches and dramatic volcanic landscapes. The island’s rich, rust-colored terrain comes from high iron content in the volcanic rocks, creating a stark contrast against the turquoise waters. Despite its small size, Rabida hosts an abundance of wildlife, including sea lions, marine iguanas, and several bird species like Darwin’s finches, Galapagos hawks, and brown pelicans. The island’s saltwater lagoon is a vital habitat for flamingos, while the surrounding waters are perfect for snorkeling, offering encounters with colorful fish, sea turtles, and reef sharks.
San Cristobal Island
The easternmost island of San Cristobal (as you can see on a Galapagos Island map) is a captivating blend of rich wildlife and human history. It’s home to Puerto Baquerizo Moreno, the archipelago’s capital, and the iconic Cerro Tijeretas, where visitors can spot nesting frigatebirds and enjoy panoramic views. The island’s beaches are perfect for observing sea lions, while the highlands host freshwater lagoons and the Cerro Colorado Tortoise Reserve. The eastern end of San Cristobal is where visitors can explore Punta Pitt, one of the most spectacular sites in the Galapagos, offering excellent snorkeling, hiking, and vistas from atop a volcanic tuff, where blue-footed and Nazca boobies can be seen courting and nesting. Also, this is where Charles Darwin first set foot in the Galapagos in 1835, making it a historically significant stop for those tracing the roots of evolutionary science.
South Plaza Island
South Plaza Island, one of the smallest islands in the Galapagos, features rocky cliffs that are home to nesting seabirds like swallow-tailed gulls and red-billed tropicbirds. Its shores are frequented by sea lions lounging in the sun. South Plaza is particularly famous for its land iguana population, which thrives on the island’s dense patches of prickly pear cacti, their primary food source. The ground is covered in bright red and green sesuvium plants, creating a striking contrast against the black lava rocks and blue ocean.
Unique Galapagos Islands Map
The Galapagos Archipelago stands as a living testament to the power of nature’s forces and the intricate web of life that has evolved in isolation. From volcanic landscapes still taking shape to ecosystems teeming with unique species found nowhere else on Earth, each island tells its own story. Whether exploring the nutrient-rich waters of the Marine Reserve, hiking volcanic craters, or observing endemic wildlife up close, the Galapagos offers an unparalleled experience of discovery. This extraordinary destination, as you can see in various Galapagos Island maps, continues to inspire visitors and scientists alike, showcasing the beauty and fragility of our planet’s natural wonders.
