An elaborate Mayan city shrouded in alien conspiracy revealed the tomb of Pacal the Great.

Underwater art project will double as a massive artificial coral reef to help regenerate the damaged ecosystem.

Extraordinary sculpture garden created by an eccentric English poet.

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

The decaying remains of a once-luxurious Soviet spa town.

This building’s ghostly exterior reflects its former lives as a prison, school, and funeral home.

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

This nonsensical smiling boat shuttles passengers between two places they could've easily walked between.

Outstanding, eerie frescoes and decorations fill this 19th-century monastery.

An abandoned canal route lies hidden under the streets of Manchester.

You can row a boat through this ancient underground reservoir.

A blacklight mini-golf fever dream pays tribute to the iconic rock band.

A lush indoor jungle fills this bustling Madrid transportation hub.

The "Mother Temple of the Pacific Islands" stands at the center of 20 acres of lush, tropical prayer gardens.

The fading, forgotten remains of a once bright and booming factory.

A fashion designer's dazzling world of Japanese collectibles is hidden in a warehouse downtown.

A beloved carnival gets a modern makeover in Los Angeles.

A top-secret bunker now turned museum, is an eerie look at what life would have looked like in the event of nuclear war.

Built to be the ideal penitentiary, this abandoned panopticon saw several revolts and even a prisoners' coup.

Live data is transmitted from the Atlantic coast to instantly recreate the ocean waves in this fountain at the NOAA headquarters.

A delightful museum entirely dedicated to the tiny homes of dolls.

A collection of weird and wonderful art fills a former houseplant nursery.

Dating back to the fourth century, it's the oldest Hindu temple still in use in the Kathmandu Valley.

This enormous abandoned prison was once dubbed the "Bastille of Romania."