The world's first ice hotel is still one of the most elaborate and beautiful.

An isolated dive site teeming with cnidarians.

This modern French ossuary contains the jumbled bones of 130,000 WWI soldiers.

The stones of this Incan wall complex fit together so well you couldn't fit a piece of paper between some of them.

The best place to send your postcards home from Antarctica.

Miraculous vase predicts the future at this Tibetan Buddhist site in the Himalayas.

The glacier tucked within a New Zealand rainforest.

The small cliffside monastery known as the Tiger's Nest is said to be the meditation site of an eighth-century Buddhist master.

A grand example of 19th century Burmese teak architecture, and the most significant of Mandalay's historic buildings.

Massive stele returned to Ethiopia after 70 years in Rome.

Historic medieval fortified city in southwest France.

Historic Hull Street was actually the first street with a proper name in the Boston area.

An abstract monument to a symphonic composer.

Housing the famous Norwegian ice-defying 19th century polar exploration ship.