A disquieting Aztec sculpture displays hundreds of stone skulls representing the victims of human sacrifice.

This museum houses two of Mexico's most impressive Aztec monoliths.

This blowhole is supposedly caused by a trapped monster.

These picturesque Hawaiian falls are home to a rare species of fish that uses a special sucker to climb up cliffs.

Earth's tallest volcano is sacred to Native Hawaiians, and home to a dozen world-class observatories.

This black shoreline is made up of exploded lava particles.

These ancient sacred grounds granted amnesty to those who managed to reach them.

The remnants of an abandoned, 19th-century gold mill along Aruba's rugged northeastern coast.

The inventor of a number of hybrid corn species is immortalized with a field of giant corn.

Race through the maze, get your name on the sign.

The highest point in Delaware is located under a trailer so this marker across the street will have to do.

Considered by many to be one of the most dangerous highways in Alaska.

An unusual, super-sized grocery adventure awaits in an Ohio suburb.

A hidden barn-sized rendition of Grant Wood's most famous, and most parodied, painting.

These sub-farmland caves are home to a majestic stalactite known as the "Crystal King."

Rare recess caves fill this unbelievably beautiful Ohio park.

The highest point in South Dakota contains the ashes of Valentine McGillycuudy, the "Holy White Man."

This erect, phallic geological spire wasn't always named so domestically.

Thanks to a loophole in property ownership, this alleyway has become a cacophonous street gallery.

This replica stave church looks like a piece of Norway was simply plopped down in South Dakota.

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

One of America's first dinosaur parks gives a window into Depression-era paleontology.

A fitting attraction for the corn capital of the world.

An experimental, automotive replica of Stonehenge.