Unesco

The abstract sandstone rock formations at this Algerian national park are rich with prehistoric art.

Step inside the first house designed by Catalan architect Antoni Gaudí, considered to be one of the first Art Nouveau buildings.

An ancient fortified mound raised over the millennia from settlements built one on top of the other.

The remarkably well-preserved final resting place of a powerful ancient Thracian king.

The oldest surviving mosque in the UAE has mysterious origins and unusual architecture.

Elaborate patterns adorn the city's disappearing traditional architecture.

A historic scientific breakthrough that crosses nine borders.

Mesoamerican monoliths and zoomorphic stones covered in royal visages, ancient mythology, and grand celestial events.

A shrine contains nearly 200 statues of the Buddhist deity Jizo, dressed in bibs by parents who have lost a child.

People have been living in the cave houses on this Italian hillside since the Neolithic era.

Locals believe the purity of this huge, untouched Arctic lake could be the salvation of human civilization.

A cave in southern Italy adorned with thousand-year-old Biblical frescoes existed in obscurity until fairly recently.

Guests can stay at a hotel in the former French abbey where lie the tombs of King Henry II and King Richard the Lionheart.

An otherworldly restaurant perched on the edge of a jagged cliff next to a medieval holy city.

Mounds, rune stones, and a 1,000-year-old church, left behind by Denmark's first two kings.

An imperial fortress city that incorporated cultural elements from the entire Mughal empire, only to be abandoned the year it was finished.

A quaint Russian village in the middle of a German metropolis.