A popular tourist cave with a dark past.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

A motel dedicated to Southwestern nostalgia.

A geological mystery on Camelback Mountain.

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

A typical "Old South" manor, once owned by author Anne Rice, served as the setting for several of her witchcraft sagas.

An abandoned jewel of a ballroom on the top floor of Australia’s busiest rail station echoes with the sounds of a bygone era.

These mythological giants take time out of their busy day guarding a Victorian market to let you know what time it is.

The last Americana on Route 66.

This isn't your average roadway—it's actually a National Park and a transportation pioneer.

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

A former major munitions plant that has been converted into a sprawling art space.

Regency-era excess on the English Coast.

A Parisian cemetery where the elite and artistic are interred beneath an eccentric collection of tombs.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

The opulent home that inspired Tintin's Marlinspike Hall and the adventures within.

Two thousand artifacts from around the world collected by one woman who loved to travel.

Berthed at the Charlestown Navy Yard in Boston, "Old Ironsides" is the oldest commissioned warship still afloat.

Ice cream stand, snack bar, and time capsule of milk conveyance.

American revolutionaries and British soldiers alike are buried here in the fourth-ever cemetery in Boston.

Historic Hull Street was actually the first street with a proper name in the Boston area.

This landmark cemetery in Boston was created more than 300 years ago.

The site of Paul Revere's historic two lantern warning.

Macabre headstones carved with winged skulls, dancing skeletons, and pithy reminders of impending death.