At this Minnesota state park you can easily wade across the source of the mighty Mississippi.

A monument to the center of the North American continent may be off by a few miles.

Mrs. Mallard and her brood are a beloved fixture in Boston Public Garden.

One of America’s oldest and spookiest hotels, thanks to the residency of ghosts, dead presidents, and Alfred Hitchcock.

The final resting place of the tragic king and queen of the Jazz Age is tucked away in a small Maryland graveyard.

The purported world's shortest international bridge connects a homeowner in Canada to his backyard in New York.

A castle built for love, and abandoned due to heartbreak.

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

A Prada store in the West Texas desert that is never open for business.

Mysterious glowing orbs float through the desert night.

Minimalist modern art on a repurposed military base in rural Texas.

A former major munitions plant that has been converted into a sprawling art space.

The Corinthian columns that towered over Abraham Lincoln’s inauguration stand proud.

The development and impact of electronic media showcased in a picturesque farmhouse in Maryland.

A museum dedicated to exhibiting remarkable outsider art.

This palatial botanical garden is home to one of the largest pipe organs ever installed in a private residence, and a piece of Wood's cycad.

A layered tribute to the work of mosaicist Isaiah Zagar.

The fastest transatlantic ocean liner sat abandoned in a Philadelphia shipyard for decades.

Futuristic apartment blocks are the backdrop for Montreal surfers hangin' ten on the Habitat '67 standing wave.

Designed by Buckminster Fuller, this relic of the 67 Expo survived fire and ice.

The world's only and thus largest collection of its kind celebrates everyday wonder through simple umbrella sheaths.

Holding multiple historical boats and an entire 19th century village, this New England attraction is the largest maritime museum in the world.

The US Navy's only submarine museum is also home to the world's first nuclear submarine.

Quirky castle designed by the American actor best known for portraying Sherlock Holmes on stage.