Started nearly 100 years ago, this science experiment just keeps on going, ever so slowly.

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

A series of gun powder chambers currently hidden from view within Nobbys Headland in Newcastle, Australia.

6000-year-old coal fire moves one meter per year.

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

By standing on a particular paving stone in the courtyard, you'll hear an echo that shouldn't be.

These naturally occurring but rare geological formations are each about the size of a small house.

A friendly monster lurks outside the State Library Victoria.

Children's author May Gibbs's beloved stories about the tiny, human-like "Gumnut Babies" are immortalized in bronze.

A spectacular impact crater in the rugged heart of Central Australia.

Curious crater remnants in the middle of the Australian outback.

Not a single witness can attest to the creation of the world's largest geoglyph.

A clear example of the process of erosion in action.

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

When you get to Magnetic Hill park near the sign, put your vehicle in neutral gear, and watch it roll uphill...

The colony of South Australia was proclaimed on a hot December day under a distinctively arched gum tree.

Arcade chock-full of old timey, whimsical, hand-cranked automata and peepshows.

Dedicated to an "Unknown Man," this grave holds either the remains of a lovelorn suicide or a Cold War spy.

A perfectly preserved abandoned criminal asylum in South Australia.

Every hour a secret compartment drops from this giant pocket watch, revealing a lovely surprise.

These mythological giants take time out of their busy day guarding a Victorian market to let you know what time it is.

A whimsical menagerie of creatures carved into a 300-year-old tree trunk.

The 18th-century home was disassembled into 253 cases and brought all the way from the other side of the world.

Not the result of an accident, hurricane, or aliens, this is an eye-popping tribute to the Melbourne tram.