Nine limestone rock stacks on Australia's "Shipwreck Coast."

Largest Kauri tree in New Zealand.

Major tourist destination known for its bubbling mud-pools and hot thermal springs.

This strange geological landscape erupts with sudden bursts of water.

Tubing through a cave lit with glowworms is a magical underground experience.

An abandoned whaling station on an active volcano offers hot springs in Antarctica, surrounded by ruined giants of industry.

Buenos Aires' city of the dead contains some very famous remains, including Eva Perón.

A historic observatory precariously perched at the "Top of Europe."

Fortified medieval tower house with lovely roof garden.

The world's highest and most dangerous infinity pool lies at the precipice of Victoria Falls.

Each August, one of the largest religious (and food) celebrations in the country is held in Boston.

A 26-foot shark sculpture—a statement about bombs—set off a municipal battle royale.

A miniature Italianate fantasy village on the coast of Wales and the set of ITC classic "The Prisoner."

One of the Seven Wonders of the Modern World holds the world's tallest metal staircase.

A palatial sculpture park was built illegally and in secret by a self-taught artist over 36 years.

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

This Himalayan airport provides one of the most difficult landings in the world.

A battle between nature and architecture in the Cambodian jungle.

Khmer Rouge's high security prison.

The best place to send your postcards home from Antarctica.