An abandoned railroad tunnel is now filled with bioluminescent bugs.

An Australian lake whose pink hue defies scientific explanation.

This whimsical outsider art wall holds tiny treasures donated by the local community.

This work of art was designed to represent the Tarpeian Way Quarry that once dominated the area.

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

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

A defensive fortification carved into a cliff near Sydney Harbour.

Native Australian lizards inhabit this garden celebrating Sydney and its sister city in China.

The world's first indigenous rooftop farm boasts 2,000 plants from more than 35 different native Australian species.

A special train service transported Sydney's dead from this station to "Necropolis Receiving Houses" at Rookwood Cemetery.

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

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

A boardwalk winds through this sliver of coastal nature hidden within Sydney.

This grim museum collects artifacts and evidence of some of the most sensational antipodean crimes.

This secret Australian garden was built on love after a man planted a random bulb he found in the ocean.

Come for the flowers, stay for the bats!

Australian museum dedicated to human health and lack thereof.

A collaboration of art and ornithology mourns the calls of Sydney's lost birds.

One of Australia's largest secondhand bookstores.

Built over an abandoned train yard, this hidden gem is full of winding paths and offers gorgeous views of Sydney Harbour.

A poignant memorial to remember the Australian nurses who lost their lives during the Second World War.

This 20-story artwork on a public housing block is the tallest mural in the Southern Hemisphere and tells the story of a community.

A historic model village was gifted from residents of London to Melbourne as thanks for their help during World War II.

This classic photo booth was saved from destruction by the local community.