A 120-year-old legend concerning an empty circular patch in the North Carolina woods.

It is against the law to obstruct the view from the top of this English burial mound.

The abandoned site of the Beatles spiritual awakening and subsequent revolt.

The only thing better than tubing down New Jersey's scenic Delaware River is doing so while eating a hot dog from a giant floating stand.

This anonymous businessman sculpted in bronze became an enduring memorial after 9/11, and had been mistaken by rescue workers for a survivor in the rubble.

The sole remaining outpost of a once-thriving South Carolina chain still sells “pic-a-nic” baskets.

Stumps of an Ice Age forest, visible only at low tide.

In a 345-million-year-old cave that's 200 feet underground, dinner awaits.

The longest non-mortared wall in the country is one man's tribute to his displaced Yuchi ancestor's five-year journey to her homeland.

A breathtaking 19th-century trail overlooks Lake Tahoe.

A top secret Cold War bunker hidden beneath a Latvian spa facility is now open for tours.

This Cold War–era fallout shelter was actually a storage facility for the nation's emergency currency.

This East German military command bunker was ready for World War III.

Recognized the world over as the home of the McCallisters in the 1990 movie "Home Alone."

After a profound show of devotion for his master, a dog becomes the symbol of loyalty for an entire nation.

A melancholy guardian doubles as a judicious godmother to this small town cemetery.

Known as the most scenic route in Sri Lanka, this train line is steeped in history and offers an unparalleled view of the country.

The origins of a large, medieval castle are shrouded in mystery, but now it's a delightful garden.

The world's first invisible city square is an homage to a man who pushed the boundaries of art.

This nearly abandoned town was once a thriving mining community until a series of fires.

The fading, forgotten remains of a once bright and booming factory.

This Nigerian nature reserve is home to the longest canopy walkway in Africa.

A large statue of Pope Gregory XIII in Bologna was disguised as Saint Petronius to avoid destruction.

A symbol of friendship between the mountainous regions of Switzerland and Bhutan.