Famed for its pie, this eatery has a hidden tunnel that allowed Catholics to secretly walk to church during the Reformation.

An Amsterdam street lined with antique shops each one dedicated to a different obscure collection.

The enormous 250-room Vanderbilt mansion conceals hidden doors and secret passageways.

The U.S. Supreme Court's secret Cold War relocation facility in the mountains of North Carolina.

Over 120,000 curious objects that have shaped our modern world.

Natural rock water slides hidden in the remote forests of northern Idaho.

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

Every week, a festive public jam session breaks out in downtown Asheville.

This winding road of 318 curves is a must-visit for (careful) motorcycle and sports car enthusiasts.

This North Carolina grave is the final resting place of the world's most famous conjoined twins.

Andy Griffith's hometown has made itself up to look like the fictional town of Mayberry.

These strange large stones served as a campsite and lookout post for generations of Native Americans.

The highest point in North Carolina and the United States east of the Mississippi River, Mount Mitchell is named after argumentative explorer Elisha Mitchell.

One of the best places to see feral Colonial Spanish Mustangs in the United States.

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

A historic covered bridge, only one of two remaining in North Carolina.

Gnarled canopies of pink and purple wildflowers arch over the trail to the summit.

A psychological self-portrait in the form of a giant, segmented head.

The highest point in Tennessee, Clingmans Dome bears witness to the ravages of one type of insect.

This road in the Great Smoky Mountains was supposed to assuage a displaced community, but ended up a $52 million dead end.

This is one really big nut.

The old Route 66 town straddling Texas and New Mexico died along with the Main Street of America.

Twice a year, visitors can tour the desolate site that birthed the Atomic Age.

A clear blue swimming hole with hidden caves, still unexplored.