A giant Troll lurks under one of Seattle's oldest bridges.

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

Roadside collection of 65,000 signs.

What was to be the world's most secure Cold War document vault ended up as just a few shallow caves.

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

One of the Seven Wonders of the Modern World holds the world's tallest metal staircase.

Soaring over the Niagara Whirlpool since 1916.

Housing a morgue, rare and confiscated weapons, and autopsy remains, the Vancouver police museum displays the dark side of Canada.