This 19th-century convent is now a flourishing 21st-century hub for art.

The city’s oldest gateway to the galaxy lies at the entrance to the Royal Botanical Gardens.

The hidden ruins of an old hydroelectric plant reclaimed by nature.

This modern pedestrian bridge on the Yarra River was modeled after an Aboriginal fish trap.

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

This outdoor museum harkens back to the height of the gold rush.

Saved by the community from destruction, this sign has become a national treasure.

The compass on its front was a handy tool for 17th-century merchants who needed to know the direction of the wind.

This giant, granite purse is one of Melbourne's most unique and distinctive pieces of public art.

Breathtaking and huge 430 year old maps of Italy.

A pair of gigantic baby heads greet passengers at Atocha Station.

This enigmatic artifact is a rare depiction of an ancient Iberian noblewoman.

The iconic boulevard is the perfect place to catch sight of a bicycling skeleton, a levitating Satan, or a chef with his head stuck in a pizza.

The yawning maw of this pagan visage is said to bite off the hands of liars.

This once-controversial and slightly confusing statue of Achilles was built out of captured cannons.

The bridge is a secret gallery of discarded gum that has been transformed into miniature masterpieces.

A statue of the legendary Celtic warrior queen who fought the Roman invaders stands in one of the cities she once destroyed.

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

Ship-sized kinetic sculptural fantasy.

Giant, friendly pelicans in Central London, the most unlikely of places.

This legendary stone is of unknown origin, and throughout history has been a literal touchstone for British leaders.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the Harry Potter films.