The Panama Canal is one of the most astonishing human-made wonders, a sliver of ingenuity that allows ships to move from one ocean to another. Cruise from the Pacific to the Atlantic, or vice versa, and take in the scenery as you move through this engineering marvel built in 1914. Along with the tropical views and modern design of the canal, there’s also great opportunity for adventures on land and by the shore, where you can get in touch with the indigenous culture at the Museum of Oaxacan Art in Huatulco, Mexico, or go kayaking in Nicoya Bay at Puntarenas, Costa Rica.