17th century mosque for Shah Abbas' harem.

This 17th-century structure is a beautiful testimony to traditional Persian architecture

An outstanding piece of retro Sci-Fi architecture built into a sacred mountain.

A brilliant turquoise lake in the mountains.

Take a hidden path to the mouth of the cave to watch millions of bats swarm at sunset.

Khmer Rouge's high security prison.

A quick and simple solution to Cambodia's train woes.

A gruesome memorial for those lost in this area during the Khmer Rouge genocide.

5,000 skulls in memorial to those killed by the Khmer Rouge.

Hoax, mistake, or evidence of dinosaurs in human times?

Limestone caves in the Cambodian countryside, once the site of genocide, now a place of peaceful beauty.

A battle between nature and architecture in the Cambodian jungle.

These flying foxes dangle from the trees around the library like fuzzy black fruit.

A small, but award-winning beach known for its literally spotless reputation.

WWI hospital ship lost in a cyclone turns up on the coast of Fraser Island, where she remains rusted and forgotten.

The only pollutant in the clear blue water is sunscreen.

Brisbane's manmade urban beach has enough water to fill five Olympic-sized swimming pools.

This trio of Australian rock spires may have inspired aboriginal legend or just modern tourism.

One of the world's steepest streets seems to have houses sliding down it.

One of New Zealand’s few castles boasts beautiful gardens, grand architecture, and a history filled with family drama.

Dolphins, ancient clams and hundreds of waterfalls make this one of the world's top tourist destinations.

The glacier tucked within a New Zealand rainforest.

This strange geological landscape erupts with sudden bursts of water.

New Zealand's only running funicular railway.