Beyond the usual stories that attend old prisons, this one has deep bloody undercurrents.

A small metropolis of Pueblo cave dwellings have been carved right into the hillside of this national monument.

This museum started as a collection of Manhattan Projects and continues to add exhibits as they are declassified.

Legends surround this jagged rock formation in the New Mexico desert.

A museum dedicated to the alleged Roswell Incident.

A phenomenal assembly of pueblos in New Mexico is the most complete example of ancient ruins north of the border.

The meteor that sealed the fate of the dinosaurs landed at this site, one of the largest impact craters in the world.

This charming colonial alleyway is one of the oldest continuously used residential streets in the U.S.

The last of Philadelphia's wood-paved streets is now a landmark of terrible engineering.

A layered tribute to the work of mosaicist Isaiah Zagar.

Mural made of 100,000 pieces of hand blown glass, and until recently, the largest glass mural in the US.

A clone-tree in Washington Square Park sprung from seeds that went to the Moon and back.

Huge masonic hall in Philadelphia with lavishly themed rooms.

This elaborate towering structure was once famed for its revolutionary height.

The first park built over a freeway is a brutalist masterwork.

Statue of Lenin, from Cold War era Czechoslovakia, now in a neighborhood of Seattle.

Leave a button on the jacket of this iconic Seattle clown.

A nondescript Seattle restaurant inherited a piece of European history.

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

42nd story Pyramid shaped penthouse tops Seattle's oldest skyscraper.

This working class sculpture pounds his hammer all the livelong day.

A rotting tree in the middle of Seattle doubles as an elaborately-controlled art piece.

Granting the right of way to ships over surface traffic since 1917.

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