In Hong Kong, a fairytale flower tunnel is hidden within the gardens of a public housing complex.

World's largest permanent maze made of 18,000 conifers.

A tower-like theater in the Swiss Alps built to withstand the high winds and avalanches of the mountain pass.

The steepest classic funicular in the world glides along a dizzying incline.

A theme park that suffered massive flooding during Katrina was abandoned, and now proves irresistible to trespassing explorers.

Putt your way around Australia in a black light environment.

An abandoned jewel of a ballroom on the top floor of Australia’s busiest rail station echoes with the sounds of a bygone era.

Occult books, tarot, oddities.

The labyrinthine storm tunnels beneath the city of Melbourne are ruled by a band of urban explorers.

Once housing children next to hardened criminals this historic jail once displayed Ned Kelly's skull until it was stolen.

Is there such thing as too many fruit bats? Not anymore.

A local landmark that has become a hub of graffiti and urban exploration.

Dilapidated ruins that once treated a notorious young serial killer, currently hosting vandals, squatters, and ghost hunters.

A long spiraling walkway winds through the woods, and around a copper beech tree at the center.

A collection of outdoor mystical statues paying homage to indigenous Australians and ecological stewardship.

A disconnected rotary phone for "calling" lost loved ones offered a unique way of dealing with grief in disaster-stricken Japan.

A state-of-the-art medical facility from the Imperial era is now a derelict ruin.

The abandoned "Red Star Train Graveyard" is the final rusting place for precious artifacts of train history.

This massive steel pyramid can be entered by a set of jagged steps that let visitors stand in its heart.

This former steel and coal plant is now a neon-lit industrial fantasia.

An industrial relic is now one of Europe's most staggering art spaces.

A symbol of friendship between the mountainous regions of Switzerland and Bhutan.

For centuries no one knew there were hundreds of bones and precious artwork hidden beneath this Swiss church.

Home to the infamous "Typhoid Mary" and the worst loss of life in New York's history prior to September 11, 2001.