It's a mystery why these remains were found with no traces of their bodies in sight.

This Viking gravestone carved in a rare runic style was dug up from a London churchyard.

An image of the legendary saint stands in the shadow of a cathedral she liberated.

The most complete statue of this Aztec god sits a top a throne carved with images of hallucinogenic plants.

This colossal ancient sculpture of the monstrous Aztec rain god has a literally stormy history.

A set of medieval stained-glass windows tell the gruesome story of a Viking siege.

Two gilded cherubs perched on a church bell tower have been reminding visitors of the finitude of life since 1760.

A lush indoor jungle fills this bustling Madrid transportation hub.

These mysterious Viking chess pieces spent centuries hidden on a remote Scottish island.

One of Oxford's greatest treasures likely belonged to the legendary King Alfred the Great.

This influential Renaissance-era library was once the haunt of kings and monks.

This partially reconstructed Aztec pyramid gives a glimpse of what its larger counterparts would have looked like.

London's marvelous wildfowl reserve along the Thames.

In Coyoacán, a pair of coyotes crown a public fountain in reference to the ancient Aztec name of the borough.

This sweet-toothed bear searching for snacks has been a symbol of Madrid for decades.

This giant geoglyph of mysterious origins is now the site of neo-pagan rituals.

The last resting place of the famous Native American princess is marked by a haunting monument.

An impressive armored bronze effigy marks the tomb of one of the medieval era's greatest warriors.

This foreboding medieval castle was twice besieged by barons rebelling against the English king.

A statue of the legendary Celtic warrior queen who fought the Roman invaders stands in one of the cities she once destroyed.

The library houses an incredible collection of some of the world's most impressive books and manuscripts.

Inside a busy metro station, an impressive mural depicts the prehispanic city of Tenochtitlán.

These unusual paintings give thanks to the saints and deities who granted people favors and miracles.

A sublime medieval path adorns the marble floor of one of the most beautiful Gothic cathedrals in France.