Underground Tours in North America

Two swipes of a MetroCard is all it takes to experience the New York subway, the beating heart of the City That Never Sleeps. This guided walking tour showcases the history of the 113-year-old underground transit system, from gilded ghost stations - complete with Jazz Age chandeliers - to the most modern station: the Oculus at the recently completed World Trade Center station. With a maximum of 12 passengers, this small-group tour gets you close enough to hear every comment and historical detail, whether you're an inquisitive subway buff or a quiet historian.

Get ready for a magical journey through a natural underground museum known as Río Secreto, where the history of our planet is written on the myriad geological formations, and where floating in its crystal clear fresh water will change your life forever. Excursion Highlights - A journey through one of Mexico's most distinct and alluring nature reserves - Amaze with underground rivers and impressive natural rock formations - A fun tour through a natural wonder of the world, truly unique.