The medieval center of the Islamic world was also once the seat of Saladin's sultanate.

A clear example of the process of erosion in action.

A plaque at the lighthouse where Frederick Valentich made his last radio contact before he vanished without a trace.

The sand is such a bright white that on sunny days you practically need sunglasses to look at the ground.

Built over an abandoned train yard, this hidden gem is full of winding paths and offers gorgeous views of Sydney Harbour.

The Victoria-era quarantine station for Sydney.

Some of the clearest water anywhere in the world.

Huge herds of Asian elephants can be seen walking, bathing, and just chilling at this Sri Lankan park.

An ancient stone fortress considered by many to be the eighth wonder of the world.

This elaborate temple was built around one of the Buddha's teeth.

One of the few places where inexperienced snorkelers can spot a shark.

Once thought to be the Garden of Eden it holds a holy footprint claimed to belong to Adam, Buddha and Shiva.

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

The glacier tucked within a New Zealand rainforest.

A glacier pocked with ice caves and surrounded by rainforests.

A perfect turquoise lake colored with glacier dust.

A solitary tree has grown up all alone on Lake Wānaka, backdropped by the beautiful Southern Alps.

The Dalai Lama named this New Zealand landscape the "Spiritual Center of the Universe."

Lebanese castle built by one man, over a lifetime.

Mummies preserved naturally for seven centuries.

A monumental underground karstic wonderland is also the water source for over a million citizens of Beirut.

An open-air gallery and garden in North Lebanon with plans to continue growing.

Lebanon's highest point offers expansive views, martian terrains, and eerie ski lifts.