Enrol for a fantastic tour of two of the biggest islands in the Galápagos. Start on Santa Cruz Island, where you will visit lava tubes, Los Gemelos, Tortuga Bay, and Las Grietas while spotting remarkable wildlife. Continue to Isabela Island for kayaking, snorkelling, and encounters with flamingos, penguins, sharks, sea lions, and marine turtles. Trek across the lava fields of Sierra Negra Volcano, one of the most active volcanoes in the archipelago, and explore its fascinating geological features.