Hidden in Central Park's Ramble is a troublesome cave buried just beneath the surface.

A treasure trove of artifacts, books, and artwork from the "golden age" of exploration.

Long the exclusive domain of birds and vagabonds, this little-known Central Park peninsula is open to the public once more.

Become a prohibition rebel.

Historical figures from New York City's Catholic community reside in Midtown.

Twice a day one of these tragic bronze mariners drowns with the tide to remember all those the sea has taken.

Order scoops of pandan, lychee, and black sesame at this family-run institution.

Revolutionary War casualties fill the only 17th century structure remaining in Manhattan.

This lower Manhattan bar is set up in an old bank vault that rests beneath a skyscraper that hides even more historic splendor.

More gold than anywhere else, ever.

This Russian bar-restaurant lies within a three-story underground bathhouse.

Macabre headstones carved with winged skulls, dancing skeletons, and pithy reminders of impending death.

This historic patch of real estate offers a glimpse of colonial Boston.

"Mock all and sundry things, but leave the saints alone."

This landmark cemetery in Boston was created more than 300 years ago.

Every summer local children form "pysja patrols" to save young birds that have wandered from their nests.

This scalding hot river was thought to be a myth until one geoscientist made it his quest to study the mystical waters.

This natural Icelandic fissure allows divers to swim right between two volatile tectonic plates.

Legs Inn provides Polish food, a cornucopia of Native American artwork, wood carvings, and mounted deer heads.

Over a thousand feet beneath the Detroit streets is a subterranean metropolis few are allowed to enter.

This quaint stretch of road is the final resting place for hundreds of America's four-legged veterans.

A natural swimming pool in the middle of the Carite Forest.

Hidden beneath the waters of Lake Michigan rests a perfectly intact ship from the early 1900s.

The world’s largest truck stop includes a barber shop, chiropractor, and a huge museum with antique trucks.