The only remaining historic maritime signal station in the United States.

These towering spires and glowing walls are carefully crafted from hundreds of thousands of icicles.

The most photographed house in Maine looks good enough to eat.

The Pope’s secret escape route.

The only remaining arch of the oldest stone bridge in Rome stands in the middle of the Tiber.

This is the oldest Roman-made bridge in the city still existing in its original state.

Believed to be the remains of the lost Temple of Minerva, this nymphaeum has been known by its misnomer to this day.

An ancient Egyptian obelisk is now used to commemorate fallen Italian soldiers.

Ancient ruins hidden underneath a modern luxury hotel.

A rare example of a medieval house in Rome adorned with a melancholic inscription.

This one-of-a-kind Roman arch is not actually dedicated to the god Janus.

A "haunted" landmark on the coast of Southern California.

One of California's oldest continually used high schools has an interesting history, both on and off screen.

This iconic 1958 tower welcomes air travelers to Tucson with neon-lit letters and architectural style.

Collection of vintage trailers double as hotel rooms.

The Jewish section of the famous Boothill Graveyard was abandoned for nearly 100 years.

An old saloon in the West filled with history, and according to some, a few dozen ghosts.

A natural history wunderkammer in the middle of the desert.

Make a wish at what might be America's only Catholic shrine to a sinner.

Religious statues built because of one man's bargain with God fill this peaceful sculpture garden.

Legend says train robbers stashed their gold within the depths of this unusual cave.

Maine's oldest diner also happens to win acclaim for its elevated comfort food.

A mural of a boy making a phone call connects a southern Maine community to a town in Iraq.

This statue intended for children to enjoy became a minor political spat.