Once one of the world's great cities, Cahokia was a place of religious worship, trade and mass human sacrifice before being mysteriously abandoned.

Dyed by iron oxide over centuries, these sandstone rocks rise thousands of feet into the sky.

The 340-year-old house that inspired the classic Nathaniel Hawthorne novel.

This massive store is home to an eccentric collection of vintage, retro, and peculiar goods.

A building so large that it has its own weather.

Electrical pylon in the shape of Disney's beloved mouse.

An interesting decoration on this historic site, this weathervane comes with as many legends as it does questions.

Every equinox this Maya pyramid puts on a spooky ancient light show.

The former home of the Nobel Prize-winning American writer is now home to dozens of six-toed cats.

The site of Paul Revere's historic two lantern warning.

A bizarre roadside attraction and the first instance of miniature golf in the world.

The American Revolution was galvanized into serious action due to the tragic clash with British soldiers that occurred at this location.

A monument celebrating the idea of reaching inaccessible places.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.

Macabre headstones carved with winged skulls, dancing skeletons, and pithy reminders of impending death.

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

A former waterfront market is now in the center of town due to some interesting Boston engineering.

Here, at the "world's longest art gallery," you'll find forty miles of ancient petroglyphs and pictographs.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

The world's longest known cave system.

The oldest cemetery in New Orleans, resting peacefully for over 200 years now.

One person's lost luggage is another person's treasure.