An innovative local park built from an abandoned sewage treatment plant.

The oldest operating cemetery in Denver is the eternal home of some of the Centennial State's most famous residents.

The two-cell building in Nebraska was briefly owned by a teenage boy and then a Hollywood dummy.

Two hundred tons of pioneer artifacts were painstakingly recovered from a shipwreck at the bottom of the Missouri River.

These former Cold War launch sites have been preserved for tourists to see where the button might have been pushed.

A memorial to the late U.S. Senator Paul Wellstone, who died at this location, along with seven others, in a plane crash in 2002.

An abandoned bus station transformed into a museum dedicated to the history of Greyhound Lines, in the place where it all began.

Small-town museum dedicated to outer space ... and bicycles.