Detroit’s downtown castle is one of the oldest structures in the city.

Controversial tribute to the heavyweight champion boxer who grew up in Detroit.

Opulent downtown movie theater now houses cars as an indoor parking garage.

This railway-turned-greenway provides a pedestrian link in downtown Detroit and celebrates urban artwork.

One man's attempt to create an artistic wonder on a run-down block in Detroit.

St Bernard de Clairvaux Episcopal Church, better known as one of the oldest European buildings in the Western Hemisphere.

A faithful reproduction of Al-Jazari's enormous water clock.

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

A 100-year-old purveyor of curiosities, curios, and kitsch featuring mummies, shrunken heads, and a Fiji Mermaid.

A wall of chewing gum moonlights as collective art.

A museum dedicated to the history and exploration of both popular music and science fiction.

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

The headquarters of the famous Yale society.

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

A museum designed by and dedicated to P.T. Barnum in the town where he is buried.

Connecticut sites linked to the only trial to ever use demonic possession as a criminal defense.

A second generation sun-powered marvel lights up the night.

World War II-era Nazi compound nestled in the Santa Monica hills.