The reefs and rocks off San Cristobal are known for their wealth of sealife. Book a two-tank dive with Galapagos Underwater (www.galapagos-underwater.com) and you’ll likely be headed to Kicker Rock, a unique rock formation one mile offshore. Expect to find sea turtles, hammerhead sharks, stingrays and eagle rays. Snorkelers can also swim through the channel to see this natural aquarium. Best for ages 10 to 18.