In a largely deserted ghost town, a little brick building recalls its history as a gold rush hub and haven for outlaws.

A one-of-a-kind sundial at the Very Large Array honors a radio astronomy pioneer, incorporating the original piers from his breakthrough radio telescope.

This popular pitstop lives up to its name.

Step back in time on this preserved 1800s farm.

Led Zeppelin wrote some of their most iconic songs at this little 18th-century Welsh cottage.

Does being buried standing up help you get into heaven faster?

The discovery of this Neolithic settlement, which contained a Stone Age "cathedral," threw archaeologists for a loop.

Amazing and mysterious Neolithic settlement on Scotland's Orkney Islands.

This hunter-gatherer architecture is believed to be the oldest religious complex known.

The highest peak in the Jemez Mountains and the traditional center of the Pueblo world.

The quiet field that inspired one of the most famous songs of all time.

A gigantic 10-foot tall stone man.

Home to items never before seen by the public.

The privately owned cemetery that holds room for Washington's finest when they step down from life.

The house where John Wilkes Booth conspired with his co-conspirators.

D.C.'s first central library was born out of a chance encounter with the philanthropist whose name it bears.

Obscure Freemasons still live in D.C.’s largest private residence.

A monument in Washington D.C. marks the spot from which all other roads were supposed to stem.

A brick-paved former section of the historic coast-to-coast highway.

This ancient goddess temple inspired the design of India’s Parliament House.

This 11th-century temple gave rise to the word "juggernaut," as well as some mysteries that defy scientific explanation.

The oldest still-inhabited hill fort in India looks like a magnificent golden sandcastle.

This rare example of a "tidefall" is a spectacular drop from the cliffs down onto the beach.

These eerie outliers of the lightning bug family glow a mysterious blue color.