At Washington's Dulles Airport is a satellite museum (no pun intended) with three quarters of a million square feet of aircraft history.

These unusual rooms on wheels are holdovers from the 1960s.

A creepy sculpture of a decapitated head invites viewers to see St. Louis through its empty eyes.

This titanic oil company sign is a reminder of the Americana boom of the 1970s and also its commoditization.

The Old Courthouse takes visitors on a captivating trip through St. Louis' timeline.

A chessmaster's dream destination.

Less a museum than a bizarre fantasy world created by artists and engineers.

Sitting in the arguable birthplace of the Wild West, this museum holds the largest collection of bronco busting bric-a-brac in the world.

Inside houses a vast collection of military aircraft and missiles spanning the ages.

A sealed test tube said to hold Thomas Edison's dying breath was given to the inventor's friend and mentee, Henry Ford.

One of the few working locomotive roundhouses in the United States.

Inside the Wayne County airport is an amazing collection of lights and sounds.

Beautiful scenery, history, science, and physics come together in this remnant of shipping lore.

An enormous roadside pan tells the story of a battle for pie glory.

A comedy troupe's collection of bizarre humor.

Island where motor vehicles are banned -- home to the only carless highway in the United States.

Strange physical sensations and optical contradictions keep visitors coming back for more.

The fifth-longest suspension bridge the world, connecting one Michigan peninsula to another.

The plants form a living library and laboratory for researchers and students at Michigan State University.

Railroad officials in the early 1900s sought to spare travelers the sight of Roman soldiers’ private parts.

Once a sewer culvert, this road tunnel now offers cyclists and pedestrians a subterranean stroll under the C&O Canal.

This seemingly out-of-place gas station by the Watergate hotel was once described as the most expensive gas station in the world.

A derelict bit of infrastructure from the canal that once ran through D.C. is landlocked in the heart of the city.

The fountains of the U.S. Navy Memorial are annually salted with water from the Seven Seas as part of a nautical ritual.