Abandoned concert venue legendary for its rock counterculture.

A Beaux-Arts triumph set to become Ford's innovation campus

The Beaux-Arts aquarium boasts a vast collection of saltwater and freshwater fish on an island in the Detroit River.

Canada's subterranean Cold War museum has doubled as a movie set.

An unoccupied lighthouse encased in layers of ice from the waters of Lake Erie.

Landmark dedicated to the plight of the American Indian in the 21st century.

The purported world's shortest international bridge connects a homeowner in Canada to his backyard in New York.

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

A school teacher's massive and terrifying self-built castle.

Little island known for its massive beachfront "flowerpot" pillars.

A field in which God and his son Jesus purportedly appeared to a young farm boy named Joseph Smith.

Comprehensive gaming collection of over 30,000 electronic games and consoles.

Collection of antique science instruments displayed in recreated 1870-1930 laboratories.

Niagara Falls holds a special place in Nikola Tesla's history, so they put a statue on it.

These strikingly barren, rolling red hills were caused by bad farming practices.

A well-preserved network of cavernous tunnels have spent silent centuries removing Toronto's waste.

Lost subway station nestled beneath Toronto's busy commuter line.

Secret Swing.

Nestled near the mountains of western Canada resides this behemoth earth mover.

The longest continuous lava tube in Oregon.

Fossils, railroads, and waterfalls!

Beyond being incredibly fun, not much can be said about the Hole with certitude.

A roaring, awe-inspiring double cascade of icy water flows through woodland Oregon like something out of a Tolkien novel.

The world's smallest park was dedicated in 1948 as the only colony for leprechauns west of Ireland.