Mile-long cave system near Great Smoky Mountains.

In one of America’s oldest mountain ranges, a long-awaited section of a scenic highway is now open to the public.

This 19th-century building inadvertently preserved the handprints of its builders within its walls.

Knoxville’s architectural icon was the symbol of the 1982 World’s Fair, even catching the googly eye of Bart Simpson.

This shrine to McDonalds' most iconic sandwich holds a 14-foot tall burger.

After the queen of Spain had a dream where these statues fell and crushed her, they were removed from the palace and given new homes around Madrid.

High winds can make this one scary landing.

This extinct volcano rises above Edinburgh and is special for its panoramic views over the city.

House of vintage taxidermy and Steampunk sculptures in a quiet Pittsburgh neighborhood.

A preserved factory in the "Home of the Carrousel" is now a museum dedicated to the classic wooden ride.

The palatial McDonald's that inspired Wesley Willis.

Meet your friends, marry your true love, or tell your enemies to kiss your butt under this historic Pittsburgh timepiece.

Elaborately carved to showcase the glorious wealth that the age of exploration brought to the Portuguese empire.

See how aloe goes from field to store and discover the history of aloe cultivation in the Caribbean.

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

The official motto of Luxembourg reminds passersby of the Luxembourgish commitment to their national identity and sovereignty.

Look closely and you’ll notice that the color changes a third of the way up the tower.

The Trappist monk, prophet-poet, and rebel never really got to live out the eremitic life he was seeking.

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

A whimsical bridge uses saxophones to pay tribute to two great men and the European Union.

America's post-nuclear-attack chambers of Congress.

The spot where the fascist dictator made some of his most famous speeches including declaring war on Britain and France.

The United States’s oldest funicular railway glides up and down a steep Pittsburgh street.

Over 20,000 sets of spice shakers reveal the surprisingly telling history of our most basic spices.