Española Island is the oldest of the Galapagos Islands, as it sits on the southeastern end of the archipelago. The islands are of volcanic origin and are formed by the activity of what geologists call a “hot spot”. As the Nazca Plate slides to the southeast over the volcano, it produces an area for new islands to develop. This means that the islands toward the northwest are the youngest and the ones on the opposite end are the oldest.
6/12/2025
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National Geographic Endeavour II
Bartolomé and Sombrero Chino Islands
Warm ocean air and a colorful sunrise met us as we approached Bartolomé. Guests traveled by foot or Zodiac to experience the compacted ash landscape. On our first snorkeling excursion, we swam with diving penguins and sea creatures like whitetip and blacktip sharks, rays, and parrotfish. On the next snorkeling opportunity, we enjoyed seeing even more fish and sea stars! After lunch, we were back on the Zodiac for a third snorkeling opportunity. We dove in by Sombrero Chino. We spotted whitetip sharks, a school of fish, sea lions, pufferfish, and more. We ended the day by circumnavigating Sombrero Chino on Zodiac. We spotted more penguins. The community spirit that has developed over the week was evident as a Zodiac of guests serenaded Sarah on her birthday! Traveling to the Galapagos has made the world feel small. We have found common ground with guests and staff and made connections between our actions back home and the conservation of this beautiful archipelago. Written by Sarah Magnano and Robin Lockwood, Grosvenor Teacher Fellows