Discover diverse aquatic life and befriend resident turtles at this private diving grotto in north Florida.

In Costa Rica's cloud forest, the roots of a woody ficus create a botanical bridge.

A stretch of highway even lonelier than the so-called "Loneliest Road in America."

A former pillar of the Black community in Ellicott City.

Deep in the Ocala National Forest, a lonesome 19th-century grave.

A set of rowhouses built for laborers at a glass company are the last of their kind in Annapolis.

This arid landscape was once a lush wetland. Today, it's a paleontological site filled with fossilized mammoths, sabertooth cats, and more.

This covered bridge was used by both Union and Confederate troops during the Battle of Gettysburg in 1863.

Home to some of the last true noodle artisans in New York.

This large stone off the coast of Martinique had a brief career in the Royal Navy.

This stately building in Alexandria, Virginia was built by Freemasons to honor one of their most famous members.

This cannon dating to 1755 has stood guard at this suburban intersection since 1915.

The only labyrinth within the city of Alexandria.

Built to defend Washington D.C. during the Civil War, this fort became a post-war nucleus for a thriving Black community.

This millstone-topped marker details the history of a mill that served as a landmark for both Union and Confederate soldiers during the American Civil War.

This pair of unsuspecting buildings are in fact the very first modern skyscrapers in Europe.

In an alley behind a Fargo bar, you can roleplay as Mario while interacting with a popular street mural.

More than 10,000 small mirrors cover the curved surface of the world's second-largest solar oven, located in a remote village in Uzbekistan.

Oklahoma City's oldest arcade has reinvented itself as a competitive pinball mecca.

A ceramic-tiled room at the Seelbach Hotel said to have secret tunnels used by Al Capone and a crowd that helped inspire F. Scott Fitzgerald's 'The Great Gatsby.'

This theater opened in 1998, but both the building and the puppeteers who perform there have a distinguished history.

A tribute to the artist and activist who created the rainbow pride flag.

This Stockholm art museum integrates many of its pieces into the surrounding outdoor areas and natural landscape.

This Masonic lodge was the first major private building to be constructed in Washington, D.C. after the Civil War.