The largest stone circle in the world has ended up bringing up more questions than it has answered.

Two geological phenomena in one precarious locale: a towering stone window, and a deep blue void.

This subterranean necropolis holds three floors of antler-dug grave caves.

Dynastic Home of the De Piro Family.

Stone Age solar temple is aligned with the sun on each equinox and solstice.

Abandoned Roman Catholic chapel abused by Satanists before being restored.

Burial grounds for more than 1,000 bodies deep under the modern town of Rabat.

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

This Croatian island is for sale but no one is buying due to the dozens of accused Nazi sympathizers who were massacred there after WWII.

"We Seceded Where Others Failed."

The former home of the Nobel Prize-winning American writer is now home to dozens of six-toed cats.

A monument celebrating the idea of reaching inaccessible places.

This statue inspired by Renoir's famous painting embodies the jovial spirit of Key West.

A roaring, awe-inspiring double cascade of icy water flows through woodland Oregon like something out of a Tolkien novel.

Officially named the "Loneliest Road in America," this barren stretch of Nevada road offers almost nothing but sky and open fields.

Quite simply the largest tree in the world (by volume).

One of the most scenic stretches of road in America winds between some of the country's oldest trees.

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

In the middle of an extremely unforgiving and desolate high desert is the most secret military facility in the world.

The interior of the Overlook Hotel in "The Shining" was based on this Yosemite original.

At 135 years old and counting, this historic print shop is heaven for poster nerds and music buffs.

The world's largest vertical wind tunnel.

A 120-year-old legend concerning an empty circular patch in the North Carolina woods.

Formerly the most gerrymandered district in the U.S., it twisted and turned along racial borders.