The ruins of this gorgeous clifftop castle look like something from a fantasy novel.

This castle was established by the 4th Duke of Montrose and is connected to the Buchanan Clan.

Ancient cliffs resembling a kilt on Scotland's second largest island emit an entrancing sound.

Accessible only at low tide, the deserted island is dotted with World War II ruins.

Spend the night in this formerly abandoned traditional Scottish village.

"Respectful to the dead, safe and sanitary to the living, dedicated to the Genius of Memory..."

This series of Scottish caves has no clear purpose other than baffling historians.

This dramatic landscape hidden on the Isle of Skye looks as though you've stepped into the magical realm.

Ruined 11th century abbey built by King David I in Edinburgh, Scotland.

These fantastically named natural pools look like something out of a Scottish myth.

This astonishingly geometric cave has inspired everyone from Jules Verne to Pink Floyd.

A 30-acre garden inspired by the principles of modern physics.

Direct access to a gold mine showing the boom and bust of Australia's Victorian gold rush.

A pristine crater lake 12,000 years in the making, with waters like cut glass.

This 86,000-square-foot artwork is the largest mural in the world to cover a dam.

This green and white building is shaped like a massive Rubik's Cube.

One of the largest open-air museums in Western Australia.     

This once-thriving coastal area is now a preserved ghost town.

These oddly shaped pink granite formations got their name after being mistaken for massive piles of hay.

Inventive brewers use NSW ingredients to dream up flavorful beers made with local honey, native raspberries, and Mariposa plums.

A tiny town's spinning, whirling propeller collection holds Australia's largest windmill.

These public toilets are a work of art.

When it was built in 1916, this bridge was critical infrastructure for local farmers. Today, it's being restored for walking and biking.

Though it may look like a Modernist cathedral, this structure was built to store massive quantities of grain during World War II.