Marathon, located near the center of the Florida Keys, is a vibrant island city known for its fishing, boating, and tropical charm. Nestled between Key Largo and Big Pine Key, Marathon is surrounded by clear waters, coral reefs, and sandy beaches, making it a prime destination for water-based recreation.

Located off the southern coast of Chile, Cape Horn is a coastal headland on Isla Hornos, the southernmost island in the Tierra del Fuego archipelago. The Cape Horn Monument provides a spectacular panoramic view of the Pacific and Atlantic Oceans. This rocky cliffside is a popular stop for Antarctic and South American cruises.

Delhi is a sprawling metropolis in North India that contains the country's capital, New Delhi. Life is abuzz and hectic here, with traffic going every which way. A huge population shuffles through Delhi's streets, alleys and food and spice-selling bazaars, and it's quite memorable to be a part of it all.

Uyuni, in southwestern Bolivia, is best known as the gateway to the world’s largest salt flat, Salar de Uyuni. Once a humble railway town, Uyuni has grown into a base for travelers drawn to this surreal landscape, where an ancient dried-up lake has left behind a vast expanse of glistening salt crust.

An essential passageway between the Atlantic and Pacific Oceans, the Panama Canal is an extraordinary technological landmark and a testament to human innovation. Built in the early twentieth century by American engineers, the canal weaves through the Panamanian isthmus and allows easy access for commercial freighters and cruise ships alike.