These two large, rusting pieces of machinery are relics of Australia’s gold mining past.

The evolution of a simple creek cutting its way through an ochre mountain side.

This remnant of an old railroad is the tallest surviving wooden trestle bridge in Victoria.

The sullen remains of vessels abandoned in the Port Adelaide River.

The gathering point of an old Melbourne swimming club was site of a historic, world-record dive in 1918.

A conservation sanctuary for rescued koalas, some of which were saved from devastating Australian bushfires.

A tribute to one man's encounter with a frightening cryptid.

These 400 million-year-old caves feature honeycomb limestone formations.

Mind the rock monster at this cave.

One of the youngest volcanic eruption sites in Australia.

Designed to provide fantastic views of the surrounding rainforest.

This area was created to save the region's koala population.

A unique rock formation that only a few have managed to venture inside.

The tallest mountain in mainland Australia.

Cooled, fractured lava formed this geometric rock feature.

The spherical grains of white quartz sand give every step on this Australian beach a distinctive sound.

The name for this waterfall was derived from the Aboriginal word used to describe a rainforest vine.

It's said that visitors can "see" Tasmania inside this cave.

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

Ships still use this historic lighthouse to navigate dangerous, island waters.

A feat of railway engineering required to bypass a muddy quagmire.

Kakadu National Park is known for its stunning beauty and its rock art, which represents the longest historical records of any continuous civilization on Earth.

This ancient limestone cave system contains many impressive geological features.

This 1800s former railway tunnel is now part of a heritage walking trail.