This collection of ferns from across the globe is the largest assortment in the United States.

An impressive collection is dedicated to the legendary beast.

The perfectly named cave drop is the deepest in the continental United States, almost matching the height of Seattle’s Space Needle.

Bad farming practices caused this unnatural natural wonder.

An unusual sculpture, an interesting history, in a strange place, for a good cause.

This dig site outside D.C. is known for its exceptionally high density of baby dinosaur fossils and dinosaur eggs.

A priceless collection of the Nation's cryptologic history.

This free, take-a-book shop seems like a trick but isn't.

It's not hard to see why the historic Peabody Conservatory of Music's library has been described as a "cathedral of books."

The remains of a century-old mansion that met a fiery demise years after it was deserted.

Hundreds of glow-in-the-dark objects light up a museum in a historic zinc mine.

An exotic reptile facility showcasing some of the rarest, most venomous snakes in the world.

This granite rock face is named for the magnificent reflection that occurs when the sun hits it just right.

This research center for rare prosimians is studying how they sleep to help prolong human life.

Garden dedicated to native carnivorous plants and site of huge flytrap heist.

North Carolina's finest examples of Native American pictographs have survived for 5,000 years.

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

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

Home to a vast and influential collection of Shakespeareana.

Mile-long cave system near Great Smoky Mountains.

Visit this playground of waterfalls, caves and sinkholes.

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

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

Enormous lake at the bottom of a unique cave system.