The ruins of this Dutch castle sit atop a labyrinth of once-secret tunnels and passageways, dating back over 900 years.

Descend into the tunnels to experience the life of a coal miner.

The highest point in Belgium is a staircase to nowhere.

A beautiful maze marks where three countries meet.

This small window display is dedicated to the noble carrot.

Museum covers every step of the chocolate-making process, from cultivation to the finished product.

Roadside display for a popular fruit and vegetable stand.

One of the first big sculptures anywhere in Australia.

The unique work of art celebrates the 30th anniversary of the 1988 World Expo.

The sculpture shows a water rat turning the world upside-down, landing an elephant on its head.

It's home to the taxidermy remains of Peter, the dog who helped convict a murderer.

Its collection highlights the monumental tasks undertaken to map Queensland.

Brisbane's manmade urban beach has enough water to fill five Olympic-sized swimming pools.

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

A monument to the 4,114 Irish orphan girls who arrived in Australia between 1848 and 1850.

One of Sydney's oldest graveyards hides in plain sight behind a hospital.

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

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

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

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

Though considered an eyesore by some, this boxy Brutalist high-rise plays a significant role in Sydney's past.

Come for the flowers, stay for the bats!

Entrance to a famous orchard with nine types of apples.

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