Tubing through a cave lit with glowworms is a magical underground experience.

Skeletons dressed in extravagant 18th century royal costumes cavort in the aisles of this German basilica.

A church of bones, decorated with 40,000 human skeletons.

The history of occult science is turned into a creepshow at this lurid Prague tourist attraction.

A nuclear power plant abandoned along with an international allegience.

A Spanish-style estate that has traded black ties for rock concerts.

A series of five defunct panopticon prisons in Cuba.

Neo-cave art on the macro scale.

Once a favorite playground for the world's most illustrious guests, Hotel Nacional's secret weapons and bunkers reveal a more menacing side to its golden history.

This communist country can still appreciate its fragrant past.

Two New York rooftops are home to the largest rooftop soil farms in the world.

An abandoned horticulture institute gloomily presides over rows of derelict and vine-wrought greenhouses.

These rat eating Giant Malaysian Pitcher Plants may have evolved to eat shrew poop.

A young botanist's horticultural vision realized through a lifetime of planting, tending, and collecting seeds.

Go surfing on this urban wave, "hacked" by local surfers.

The moving metal works of one troubled artist can still be viewed on his front lawn... for now.

An underground city of ancient quarry tunnels hid thousands of Allied soldiers in WWI.

A New England ghost town features a trail of boulders etched with intriguing life lessons.

A miniature rainforest is growing inside of a Midtown Manhattan office building.

The sound of swaying stalks in this stunning grove has been named a governmentally recognized sound.

A 4,500-year-old forest is slowly being revealed from beneath the sands of a Welsh beach.

A beautiful Victorian-era cemetery, complete with a miniature village.

270 million year-old forest of stone.

This charmingly homemade amusement park has been growing for 40 years.