The semi-reclaimed ruins of this canal were once part of an ambitious plan to reroute the mighty potomac.

A geological mystery on Camelback Mountain.

This stretch of beach along California's central coast is a busy highway for the largest seal in the northern hemisphere.

Centuries of crashing waves carved out this small hole in the rock, which lights up at certain parts of the year.

The oldest hotel in Nevada.

A statue commemorating a 16-year old girl's nighttime ride to raise a militia against attacking British troops.

The phrase "the shot heard around the world" was coined after a skirmish at this bridge.

These delicate buggers are some of the rarest fossils that have bubbled up from the Tar Pits.

Every weekend, people gather here for a brief chance to see their loved ones on the other side of the United States–Mexico border.

The awe-inspiring ship from the golden era of cruising has an incomparable history and a reputation as one of the world’s most haunted places.

Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.

This immigrant bridge once spanned the Thames but is now a fixture of an Arizona city.

Two nearly identical Chinese pagodas stand side by side, along with ancient stone relics.

The earliest pagoda built in the beautiful Panmen Scenic Area of Suzhou.

In the past, Renaissance sex workers were encouraged to entice customers on this bridge.

100 year tradition of fist fights, marked by marble footsteps.

2300-year-old Roman road connecting the empire.

This ritzy Italian market is built around a statue of an unforgiven heretic who was burned for his belief in an endless universe.

A detailed pachyderm supports Rome's smallest Egyptian obelisk.

The spot where the fascist dictator made some of his most famous speeches including declaring war on Britain and France.

Breathtaking and huge 430 year old maps of Italy.

Historic fortifications form the boundary of Vatican City, but it’s not entirely surrounded by walls.

Like stepping into a spooky fairy-tale, this shop carries the dark ideas of artists and other makers.

Experience the hysteria of a 17th century witch hunt through goofy reenactments and wax dummies that should probably be burned at the stake.