The hallucinogenic center of the ancient world.

Monasteries on rock pillars, once accessible only by frayed ropes.

This 13th-century monastery chiseled into the side of a mountain is equipped with a bridge that can be lifted to protect against raids.

This once luxurious Catskills resort is now a haunting ruin.

This wall on a street corner in Lower Manhattan has been a blank canvas for a rotation of renowned artists since the 1980s.

One of the city’s oldest watering holes was originally the home of a famous James Brown (not that one).

The fanciest public restroom in New York City boasts fresh flowers, art, and a classical music soundtrack.

For over 80 years, Mayan ruins stood proudly in a most unlikely location.

This once-private estate is now a dreamy, meditative garden that's open to the public.

An abandoned castle owned and ignored by Masons carries a cursed history.

These mouldering mansion ruins remember a time when the Catskills were nothing but luxury.

This Central New York ghost town was once a prosperous railroad community.

This once sprawling resort now sits abandoned, filled with graffiti and vibrant colors from an era long passed.

The world's largest kaleidoscope, designed by a 1960s psychedelic artist.

"A hideous albatross in the Hudson River Valley."

An enormous cat made of recycled wood scraps.

The Hudson River School comes alive at this palatial estate.

Few of the many visitors to this resort town know of its hidden Maya ruins.

One of Mexico's least-visited archaeological sites is tucked away inside a theme park.

These azure waters were thought to lead to the Mayan Underworld.

This one-of-a-kind convent boasts a kaleidoscopic exterior of stars and double-headed eagles.

Its sunny hues are believed to have inspired the town's color palette.

A lovers' beach, tucked below the surface of the island, provides a safe haven for romance.

The Cycladic architecture makes this Athens neighborhood feel like an island paradise hidden in the shadow of the Acropolis.