One of the world’s oldest surviving convict prisons, once the scene of daring escapes and riots.

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

A forest pool so dark and frothy it's earned the nickname the natural cappuccino.

This is a full-scale replica of a complete Stonehenge made from locally quarried Esperance granite.

This memorial to a murdered empress took 20 years to design, then spent 30 years hidden away in storage.

From Austrians to Nazis to Soviets, this historic Budapest fortress has a history as complex as the city itself.

This Hungarian castle was built out of cardboard and wood until it proved so popular that it got upgraded to stone.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

A tiny museum in Esperance, Australia, displays a bunch of space debris from NASA’s Skylab.

This gracefully curving formation looks like a massive wave that was suddenly turned to stone.

There's a lot of horsing around on this lonely stretch of Australian highway.

A metal skywalk leads to the top of this striking granite outcrop in Porongurup National Park.

A replica of an early 19th-century vessel that sailed across the world.

Home to the last shore-based whaling station in Australia.

Wild seas have created two spectacular formations just a stone's throw away from each other.

This water wheel turned to stone in a matter of decades.

This ancient limestone cave system contains many impressive geological features.

Incredible rock formations jut from the southern end of this spectacular stingray-viewing spot.

The longest timber-piled jetty in the world has an underwater observatory.

In Tasmania's "Valley of Views," dozens of novelty mailboxes add a quirky element to the landscape.

One of the largest collections of traditional Māori artifacts in New Zealand.

A 19th-century perch for spotting sailing ships now boasts one of the most iconic views in the Southern Hemisphere.

To commemorate a century of gold mining, this Australian city built a monument that features a replica of a 150-pound gold nugget found there in 1858.