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

Come for the flowers, stay for the bats!

The statue honors an adventurous seafaring cat.

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

It's said taking a hammer and nail to this stone relieves a toothache.

A circle made up of 19 boulders has stood in Scotland's Bladnoch Valley for some 4,000 years.

This standing stone has a unique backdrop thanks to some of the United Kingdom's best-rated beaches.

19th-century scientists would make the pilgrimage here to verify the precision of their measuring sticks.

These morbid carvings remind churchgoers of the inevitability of death.

This stone spire holds a unique place in the region's history.

An unassuming London park is actually a pilgrimage site for modern clowns.

A labyrinth hides in plain sight at each of the city's 270 Tube stations.

The Art Deco artwork depicts gilded carriers of deadly illnesses.

Murals of the wild parties once held on the frozen River Thames.

This one has sailed five times as far as Sir Francis Drake's famous ship.

The commemorative stone column conceals a secret laboratory.

One of Antoni Gaudí’s earliest buildings, built between 1886 and 1890 for the industrialist Eusebi Güell.

A curious little museum dedicated to the furry feline in the cat haven that is Old Town Kotor.

These historic defenses ensured the city within would survive hundreds of years of occupations, sieges, and invasions.

Destroyed Serbian army headquarters sits half crumbled in a largely revitalized Belgrade.

Oriental bazaar in the heart of Sarajevo.

This hilarious English intersection is an automotive whirlpool.

Ancient human remains unearthed around the iconic monument.

The oldest working mechanical clock in the world.