This massive redwood tree has a hole in the base big enough to drive through.

A 150-year-old steam locomotive crosses the southern half of the island daily.

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

A non-native grove of 241 redwoods in Southern California.

According to the legend, this structure was built in a single night with the help of the devil.

A narrow opening between the mountains of the Amalfi Coast creates a scenic hidden beach.

One of the four sanctuaries of Rieti's Holy Valley was the site of the first living nativity scene.

Deep below the dry landscape of Bahia, a cave with intense blue water to float in.

The ruins of this Roman temple dominate the small city in southern Lazio.

Some believe that this ancient mural depicts technology far ahead of its time, but in reality it's nothing quite out of place.

This seventh-century fortification marked the western border of the Lombard duchy of Spoleto.

An exploration of a small ethnic group’s heritage through their exquisite folk art.

An impressive museum dedicated to the resource that made the Scandinavian country rich.

An off-the-beaten path cave with an underground lake.

An abandoned 146-acre summer resort slowly being reclaimed by nature.

Standing for over 200 years, the abandoned home of a Revolutionary War hero and later a succession of prison superintendents.

An overgrown and abandoned tuberculosis ward resides in the midst of a quaint modern neighborhood.

One of the few places in the world home to living stromatolites.

During World War II, the Shroud of Turin was secreted to this remote southern Italian complex.

A few crumbling buildings and the occasional pipe sticking out of the ground are all that remains of the largest refugee camp in Sweden during World War II.

Τhis feline monument commemorates fallen soldiers on a field that saw many, many battles.

A home base for Judy Chicago, one of America's leading radical feminist artists.

Brace yourself for the slowest, scariest, most spectacular drive, down the Drakensberg Escarpment.

This quarry filled with 65 million-year-old limestone is now home to a nature reserve.