Located in the central part of the archipelago, Bartolome is an iconic island in the Galapagos. There are interesting geological formations to spot while hiking and amazing marine life to observe when snorkeling.
Sombrero Chino has a very interesting visitor site. The island is close to Santiago, and it has a protected bay that is great for Zodiac exploration, kayaking, and underwater exploration.
Both islands are good places to observe Galapagos penguins.