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

This salt lake in South Australia features seasonal color changes and its very own loch monster.

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

The longest fence in the world stretches over 3,000 miles to keep the dingoes out.

Along the Stuart Highway, two giant sculptures tower over the roadway.

Clusters of huge boulders in the Australian Outback.

A serene space tucked amid the skyscrapers of Hong Kong's bustling financial district.

A self-funded cemetery with a long list of inhabitants.

A collaboration of art and ornithology mourns the calls of Sydney's lost birds.

Come for the flowers, stay for the bats!

Native Australian lizards inhabit this garden celebrating Sydney and its sister city in China.

A building so large that it has its own weather.

The highway's southernmost spot is a beloved local attraction.

A historic presidential getaway on the continental United States' southernmost island.

A monument celebrating the idea of reaching inaccessible places.

Island ghost town detailing Flagler's folly in building the Overseas Railroad.

A man throwing a giant severed hand towers over Antwerp’s main square.

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

A tribute to the Polish insurgents who fought in the failed attempt to end their city's Nazi occupation.

The Polish capital has had a deep connection to its guardian mermaid for almost a millennium now.

The largest civilian satellite control center in the world is located in the middle of a drained lake.

This ritzy Italian market is built around a statue of an unforgiven heretic who was burned for his belief in an endless universe.

The Italian revolutionary's legendary wife is portrayed on horseback waving a gun and holding her child in this memorial on the Janiculum.

Historic fortifications form the boundary of Vatican City, but it’s not entirely surrounded by walls.