This stone tower marks a lookout point over the historic Washington Crossing, and maybe some buried treasure.

Once on display alongside a giant Gumby, it’s as tall as a nine-story building when fully extended.

The pop art icon's gravesite is broadcast 24 hours a day on his museum's website.

It would take 35 firetrucks to fill this enormous glacial pothole.

An outlandish shoe shaped house built by an eccentric millionaire.

Pennsylvania's own Roswell-style UFO mystery.

A historic covered bridge is but one example of an oddly prevalent American urban legend.

The Pennsylvania landscape depicted by a quarter mile of mosaics made from used road signs.

This old residential building was once the largest flour mill in the world.

Explore the History & Technology of Electronic Communication

Long before guestbooks and hotels, frontier travelers signed their names on this rock face.

The literary king of the Jazz Age was born in this lovely Minnesota home which still honors his legacy.

A bronze statue on a downtown corner honors Minneapolis's favorite career gal.

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A striking sculpture built to honor the women of the Lakota and Dakota Nations.

Every president in history is immortalized in bronze in downtown Rapid City.

This Wild West attraction is alive with glitching automatons.

A six-ton, 12-foot-tall concrete prairie dog is touted as the largest in the world.

A fitting attraction for the corn capital of the world.

The ravine where Jesse James supposedly performed an impossible jump to evade capture.

This prehistoric sinkhole lured exclusively male mammoths to their death, much to the delight of science.

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

A place where the laws of nature seem to have gone completely berserk... but of course haven't.

Hidden behind Lincoln's head is a 70-foot-long chamber containing enamel plates documenting American history, sealed in a teakwood box in a titanium vault.