The semi-reclaimed ruins of this canal were once part of an ambitious plan to reroute the mighty potomac.

Designed to commemorate the founding of the first settlement in Delaware.

World War II-era bunkers are hidden under the beaches of this picturesque park, which is still scattered with wartime watchtowers.

The land is home to swimming ponies and a legendary 18th-century treasure.

Yo, Adrian!

A tour de force of a fountain, memorializing a man who loved fountains more than anything else.

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

America's smallest national park site is the former residence of exiled Polish national hero Thaddeus Kosciuszko.

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

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

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

This striking art museum holds an amazing series of curiosity cabinets.

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

This freshwater spring fills with 10,000 gallons of water per minute.

This lone tree and dramatic sandstone outcropping are so beloved by Michiganders they can be found on one of the state’s coins.

This national park on the shore of Lake Michigan features remarkable dunes that lie at the heart of a Chippewa legend.

This $3 million model train takes you through Chicago, Seattle, and the thousands of miles in between.

The unluckiest U-boat in the entire German fleet is now on display in a Chicago museum.

The palatial McDonald's that inspired Wesley Willis.

A goddess-topped water fountain in Chicago was created thanks to the dreams of a thirsty newsboy.

A journey begins with a single step, and for many, the road-trip of a lifetime started at this Chicago intersection.

A spectacular remnant of an Adler and Sullivan masterpiece that was destroyed in 1972.

The twin towers in this Chicago fountain use 50 foot tall video screens to spit on people.

A giant bronze coil of feces is both a tribute to doggie defecation and a reminder to pick it up.