An ancient Egyptian temple in the middle of Madrid, Spain.

Commonly acknowledged as the only public monument to the Devil himself.

Madrid's romantically ornate crystal palace has been offering shelter to plants and art for over a century.

Polish luminaries and masterful folk art find sanctuary in this unique cemetery.

Beneath Kraków Old Town's main square lies a hologram-filled medieval market vampire graveyard wonderland.

This grubby wall is said to be one of the Earth's esoteric energy centers.

A statue commemorating a Polish dog who took his role as man's best friend very seriously.

Fortified medieval tower house with lovely roof garden.

This bustling Italian plaza is built on the ruins of an ancient Roman amphitheater.

This bronze boar's snout has been rubbed to a golden sheen by visitors seeking good fortune.

A copy of the famous statue can be found in this Florence piazza, along with one of the most breathtaking views of the city below.

Two stone columns flank the grand Venice square, but there were supposed to be three.

Every equinox this Maya pyramid puts on a spooky ancient light show.

No telescopes, no power, no gift shop: The Observatory of Chichen Itza, one of the world's oldest observatories, takes astronomy back to basics.

A magical sinkhole on the Yucatán Peninsula is adorned with mini waterfalls and hanging vines.

One of Mexico's least-visited archaeological sites is tucked away inside a theme park.

These winged Maya figures are the subject of speculation and conspiracies.

"Satisfying" is a good way to describe these beautifully aligned rows of Spanish mills.

Seaside ruins of a settlement that date back to the first century B.C.