This massive complex is made up of hundreds of smaller temples that date back to the ninth century.

Of five volcanoes located in the massive Tengger caldera, this cone is the youngest and most active.

The inky volcanic sand leads to reefs teeming with aquatic life waiting to be discovered by snorkelers and divers.

Sacred waters rescued from the wrath of a volcano.

One of the holiest places in the region, devotees come to Tirta Empul to bathe in the holy spring water.

A micronation on an islet along the coast of a Portuguese island.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

This weekly bazaar started in the 1960s as a way for hippie travelers to barter their goods.

Built by the Portuguese colonists in the early 16th century, this fort is one of the oldest European structure in Asia.

Self-mutilation in the name of beauty.

This dangerous-looking suspension bridge may have been too unstable to remain open.

Holy Hindu shrine in an enormous, monkey-filled limestone cavern.

Hang out with thousands of butterflies in one of the world's largest such enclosures.

Cartoon clouds and nature-inspired murals have transformed the streets of Kuala Lumpur.

An image of the legendary saint stands in the shadow of a cathedral she liberated.

A small 12th-century temple surrounded by waters believed to have curative properties.

Abandoned soda factory on a Cambodian roadside in a state of beautiful decay.

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

This impressive clifftop temple was once at the center of an international custody dispute.

The largest Roman amphitheater in the Balkans once held over 20,000 people, but managed to lay hidden for hundreds of years.

A medieval bridge stretches over a sulfur-rich river that leads to year-round natural hot springs.

Brussels' favorite peeing boy has a sister.

Climb inside an iron crystal magnified 165 billion times its normal size.

A public work of art that also provides some relief from the summer heat.