Our voyage begins with a trio of ancient Mayan treasures at Costa Maya, Mexico, Santo Tomas, Guatemala, and Belize City. Then it's time for a dip in the clear waters off the coast of Roatan - don't forget your snorkel, this tiny island has the second-biggest coral reef in the world. Relax onboard as we spend a day at sea crossing the turquoise waters of the Caribbean, bound for Puerto Limon in Puerto Rico for more beach action. Next comes historic Cartagena, where we overnight, leaving plenty of time to stroll the colorful streets and admire the astonishing 16th-century architecture. Now we hop between Aruba, Bonaire, and Curacao - the ABC islands - for Dutch colonial history, kaleidoscopic coral, and incredible nature. Santa Marta, on the Colombian coast, is next before we relax at sea for a day, bound for the exciting experience of cruising the Panama Canal, one of the great man-made wonders of the world. We arrive at Puerto Caldera on the Pacific coast of Costa Rica, and then cross to Nicaragua, where you can watch the surfing at San Juan del Sur. Try the coffee from one of El Salvador's famous plantations at Acajutla, before we enjoy another sea day. We cross the border to Mexico for the palm-fringed beaches of Zihuatanejo, where dolphins and sea turtles play in the waves, and Manzanillo, famed for marlin fishing. Laidback Puerto Vallarta comes next, followed by a couple of days onboard as we cross yet another border to the U.S. and our final destination, San Diego.