Follow the main road east from Puerto Ayora to the expansive grounds of the Charles Darwin Research Station and its visitor center, which has an informative exhibit explaining the basics of Galápagos geology, ecology, and weather patterns. Self-guided trails lead to the station's zoo-like giant tortoise pens, where you can see the only tortoises you're likely to encounter during your visit. Your admission is included in the $100 entry fee you paid upon landing in the islands.
Av. Charles Darwin, Puerto Ayora, 200350, Ecuador