Deep within the mountains, a towering natural wall of tightly packed basalt columns mimics a colossal ancient fortress built by no human hands.

Hidden within the mountains of Vinh Son, this geological marvel features a roaring waterfall cascading over a massive, million-year-old basalt cliff shaped like a giant upside-down stone honeycomb.

This store offers tastes of Aboriginal Australia, with some contemporary and global twists.

Featuring Torres Strait Islander cuisine and Australia's first indigenous bar.

Hundreds of tiny dead butterfly eyes gaze down at diners in this Australian eatery.

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

Woven tree art gives this towering Australian woodland a touch of mystical whimsy.

Once the path of a railway tunnel, now home to thousands of glowing insects.

A castle hand-built by a Spanish dreamer in the Australian tropical jungle.

An Australian lake whose pink hue defies scientific explanation.

The site of abandoned cable car system provides expansive views of Tutuila and nearby capital Pago Pago.

At the point of oceanic inaccessibility, you can't get farther from dry land without leaving the planet.

Naked scientists race around the pole in the frigid cold to try to join Antarctica's exclusive 300 Club.

One of the world's southernmost bars.

Fire meets ice at the southernmost volcano on Earth.

Hundreds of medieval Islamic gravestones decorate the mountainous landscape in the largest cemetery in Turkey.

Fantastic lake on the heart of a fault line.

This harrowing memorial remembers a murdered investigative journalist.

A unique and controversial artifact of the early Turkish Republic.

A hilltop fortress full of tombs, including one for legendary hero Seyyid Battal Gazi.

A museum celebrating the mineral used to make ornate, carved tobacco pipes.

The only residents of this abandoned housing development full of identical castles are stray cats and dogs.