The world's largest rotating world.

This narrow canyon has been carved by the river over thousands of years into spectacular and curious forms.

Tour the world's largest deep-hole dimension granite quarry, where you can view the plant where gravestones are made and roll a ball down the outdoor granite bowling alley.

This spectacular track has run continuously since 1882.

One of the oldest living oak trees in the Southeast.

Who needs fancy modern water slides when this giant North Carolina rock works just as well?

148 feet long and in the middle of a verdant forest.

The only diamond mine in the world where you can keep what you find.

Mysterious ancient boulder carved with petroglyphs in the mountains of Western North Carolina.

Visit this playground of waterfalls, caves and sinkholes.

An arsenic-filled pool in the Grand Canyon takes on the appearance of a giant, overflowing pumpkin.

Rare recess caves fill this unbelievably beautiful Ohio park.

A mysterious castle built as a monument to lost love.

The mysterious wonder of an underground waterfall is illuminated by multicolored lights.

In the middle of an extremely unforgiving and desolate high desert is the most secret military facility in the world.

See massive fossils that are over 200 million years old in northeastern Arizona.

The largest earthwork effigy in the world.

A museum dedicated to the alleged Roswell Incident.

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

New York City's smallest piece of private property.

Wild lights and sound effects turn a walk through some caves into an eye-popping 1960s tourist attraction.

Each year these high desert hills are absolutely covered with poppy flowers in a surreal show of nature.

Bigfoot prints, Feejee mermaids, and haunted dolls on display in a tiny North Carolina town.

These delicate buggers are some of the rarest fossils that have bubbled up from the Tar Pits.