An abandoned network of military bunkers and tunnels open for anyone willing to descend into the darkness.

Former farm staffed by mental patients is now a public park.

Old submarine parts have been converted into faux whale fins.

"The House That Love Built" is shying away from "The House That Ghosts Love."

Activists are fighting to preserve these unfinished highway ramps as a tribute to the citizen revolt that halted their construction decades ago.

This graveyard contains markers and monuments dedicated to some of the darkest chapters in Washington's history.

A sliver of nostalgia in Seattle's Viretta Park.

An old vending machine serves up unpredictable beverages from its seemingly magical insides.

A colorful collection of scavenged glass bells decorates this Canadian ranch.

This hauntingly stark structure is a relic of an industrial past.

The remains of the worst maritime disaster in the history of the "Graveyard of the Pacific."

Mysterious wreckage of a small plane has been lodged in this tree since at least 1971.

A crumbling cliffside ruin hidden in the woods.

The wreckage still sits at the exact spot the plane crash-landed in 1945, carrying 1,000 pounds of explosives.

The remains of a Canadian train crash are now mouldering beneath layers of rust and graffiti.

Railways may have forged this quintet of lovely tunnels, but now they are open to hikers.

Historic psychiatric asylum and most-filmed location in the Great White North.

Hidden beneath the streets of London is a secret subway that only carried mail.

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

Abandoned Air Force base that has fallen into disrepair.