This small, ancient Roman temple was once a church dedicated to the patron saint of penitents.

This curious, round temple is the oldest still-standing marble building in Rome.

The "Great Sewer" of ancient Rome is one of the oldest sewer systems in the world, and is still in use.

This Scottish graveyard is the final resting place of the man who inspired the character Ebenezer Scrooge.

This otherwise ordinary close on the Royal Mile constituted the end of the world for Edinburgh’s poorest residents.

This abandoned boat was left in place thanks to its rotting beauty.

The angel of death appears to weep black tears at this grave marker.

A creek tumbles over a series of step-like rocks to create this scenic water feature.

The headquarters in Salem doubles as an occult art gallery.

The grave of Mary Nasson is shrouded by witchy legends.

Singing sand that stands as the final remains of an ancient lake.

A tree bears footwear on the loneliest road in America.

A shady solar power system that couldn't hold up to the harsh desert conditions.

This former Roman Catholic Church still contains the embalmed hearts and organs of 22 popes.

A detailed pachyderm supports Rome's smallest Egyptian obelisk.

A deep mark on the remains of a Roman temple, believed to be left by a legendary warrior.

A master of trompe-l'oeil creates a stunning, tourist-fooling dome out of a flat ceiling.

Try not to get slimed in Tribeca.

Twin Peaks' real life Double R Diner has been restored to its damn fine television look.

This Big Sur waterfall drops 80 feet directly into the Pacific Ocean, and inspired the hillside house up top.

Haunting and beautiful trees, doomed to die.

Every year, over 25,000 monarchs overwinter in Pacific Grove.

This concrete ship has had four careers - World War I tanker, floating amusement park, fishing pier, and artificial reef.

Housed in a memorial lighthouse, this museum relays the history of surfing, beginning with the antics of royal Hawaiian teenagers.