Marvel at the geological spectacle of Los Gemelos, a pair of large sinkholes surrounded by Scalesia forest, up in the highlands of Santa Cruz. The collapse of the volcanic roof of an empty magma chamber created these large chasms into the depths of the earth. Many plant species like bromeliads, orchids, mosses, and lichens inhabit this region. You can also find the famous vermilion flycatcher, one of the rarest bird sightings in the Galapagos archipelago, along with a number of finches ranging from vegetarian finches, tree finches, and woodpecker finches. This short walk offers much to be seen for birdwatchers and lovers of geology.