A clear example of the process of erosion in action.

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

An opal mining town in the middle of Australia where people live, worship, and shop underground.

Rainforest filled with record-holding eucalyptus.

A collection of outdoor mystical statues paying homage to indigenous Australians and ecological stewardship.

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

The largest collection of Indigenous Australian artifacts in the world, and the rare museum where wood-and-glass cabinets have trumped interactive exhibits.

The only pollutant in the clear blue water is sunscreen.

Clusters of huge boulders in the Australian Outback.

Putt your way around Australia in a black light environment.

Aqua white sand highlighted with fiery red rocks.

One of the best beaches in the entire world.

The once-dying town of Sheffield, Tasmania has reinvented itself as a village of painted wonders.

This massive water spout has been luring visitors for hundreds of years, some to their death.

This extraordinary geological oddity resembles human-made pavement.

The unique ecosystem atop an Australian mountain is home to some colorful inhabitants.

Giant, pink stuffed rabbit on an Italian mountain.

This city square is home to Amsterdam's oldest church and a statue honoring Dutch sex workers.

The world's only museum devoted to the wonders of fluorescence.

Geothermal waterfalls in Tuscany.

Italy's curious field of mud volcanoes is named for being both gross AND salty.

The mummified heart of a saint lives on in this church—after a brief hiatus when it was stolen.

The oldest public library in Ireland.

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