The Victoria-era quarantine station for Sydney.

Cockatoo Island is a Heritage-listed island in the middle of Sydney Harbour.

One of the youngest volcanic eruption sites in Australia.

Mind the rock monster at this cave.

This letter written by Queen Elizabeth II in 1986 won't be opened until 2085.

The bones of this aquatic dinosaur turned to opal over the centuries and the beast's remains were almost sold as jewelry.

This rare effigy of the author spent years lost in storage.

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

Hidden among popular Sydney golf courses is a little remembered graveyard populated by smallpox victims.

A sparkling sandstone cliffside that's worth a visit while it still exists.

The site of a tragic mining disaster in 1882.

An abandoned railroad tunnel is now filled with bioluminescent bugs.

This massive water spout has been luring visitors for hundreds of years, some to their death.

These sea cliffs are an epic natural wonder.

The sand is such a bright white that on sunny days you practically need sunglasses to look at the ground.

One man's artistic vision is a small town government's legal battle.

Three-story concrete ram with a permanent gift shop.

A rare and unique 19th-century pastoral burial site elevated off the ground.

It's home to the antenna that received the first images of Neil Armstrong walking on the moon.

A little-known museum of Ancient Roman and Ancient Greek artifacts.

With a surface area of nearly 500 square meters, welcome to the world's largest paraboloidal dish solar concentrator.

A stargazing sculpture made from the ruins of an iconic telescope.

Dozens of large-scale, creative, evocative curios from prominent artists dot the calm outdoor space around this major museum.

A beautiful little museum hidden away in the heart of Barcelona holds a treasure trove of Ancient Egyptian artifacts