One lonely, modern pyramid has gone from corporate think tank to deserted boondoggle.

Though its branches are painted bright colors by generations of locals, the tree is said to be a haunted portal to hell.

The bones of an old zoo crumbling in the shadow of a new one.

A subterranean world of tunnels links several buildings of this rare 19th-century asylum.

A lavender labyrinth so large it’s visible on Google Earth.

The city is full of whimsical portals to another world.

Turnip-shaped island just off the Michigan shore in Lake Huron.

This sprawling bookstore spans four floors and has more than a million books in stock.

The remains of an abandoned dinosaur theme park litter the woods just off the highway.

Abandoned concert venue legendary for its rock counterculture.