Discover the upper part of Santa Cruz Island on a short excursion from Puerto Ayora. Observe the emblematic Giant Land Tortoises of the Galapagos Islands in their natural free-range habitat among lagoons, trails, and the beautiful landscape of the highlands. Explore the lava tunnels, hollow rock caverns that you can walk through while admiring this unique volcanic formation, and visit Los Gemelos, two gigantic inactive twin craters formed by a series of volcanic eruptions. Along the way, also look out for birds such as the Galapagos finches and the Vermilion Flycatcher.