This seven story Japanese love hotel now stands in ruins.

The ruins of Japan’s premier water brothel.

This ruined Japanese stripclub sits half burnt to the ground.

The ruin of a Japanese love hotel almost completely overgrown with brambles.

The demolished ruins of a poorly located Japanese Love Hotel.

Once the path of a railway tunnel, now home to thousands of glowing insects.

Concrete strongholds stand guard over the Golden Gate.

The abandoned zoo enclosures offer a perfect place to experience the other side of the bars.

America's oldest archaeological site or a muddled case of wishful thinking.

This stately estate house features a tower covered in a bright, modern mural.

The ghost town left by the worst nuclear disaster of all time is being taken over by nature and urban explorers.

A walk through the historic city center, under the streets of Seattle.

A wild Hollywood resort thwarted by mosquitoes.

The seawater playground of gilded-era San Francisco burned to the ground in 1966.

The largest earthwork effigy in the world.

World's first "penitentiary," meant to be humane, drove men insane.

The once abandoned ruins of a Victorian beachside amusement park are now back in working order.

The feral felines of Roosevelt Island have a small army of allies and an abandoned hospital all to themselves.

Urban explorers embraced America's now demolished first suburban mall, south of Chicago.

Small, privately owned island divided between Michigan and Ohio with abandoned vacation homes and a derelict lighthouse.

This fairy tale-themed amusement park is now abandoned, and childhood metaphors abound.

Secret Manor, a house full of legends, the least of which is the haunting of long-deceased ladies of pleasure.

This former rail stop in Utah was abandoned, repopulated by some nostalgic friends, and now is home to a single DIY aviator who lives in a hangar.

A Marxist summer camp full of fantastical statues lies tucked away and forgotten in the forests of Moscow.