This structure atop a craggy cliff in one of the most beautiful parks in Paris boasts an unbeatable view.

The 28,000-year-old specimen is remarkably intact.

Remnants of a 4th-century church with vivid medieval frescoes and ancient sarcophagi hide beneath this old basilica.

A staggering collection of satellite models and actual flight parts.

A fortified medieval basilica on the Caelian Hill preserves extraordinary frescoes and one of Rome's most beautiful hidden cloisters.

This serene, turquoise lake in an extraordinary nature reserve showcases a rare natural phenomenon.

The ancient heart of Tunis is an enormous maze of narrow streets and alleyways.

Frozen in Norway, vended in Singapore.

The busy transport hub is home to the tallest airport slide in the world.

This museum inside Amsterdam's largest cemetery explores how people deal with death.

This charming, narrow-gauge railway in the Thames Estuary is sometimes referred to as the "Train to Nowhere."

Drink wine handed out through a window as part of an age-old tradition.

The excellent Swiss museum of witchcraft is led by a modern witch.

This Mexico City subway station will make you feel like you've been transported to the London Underground.

An exhibition space dedicated to American outsider art created between the 18th and 21st centuries.

The world's largest bicycle shelter can hold more than 12,500 two-wheelers.

This ancient trail climbs the mountain where a Latin League cult worshipped Jupiter, its main deity.

Scars of this building's past life as a violent prison still cover its walls.

An unusual resting place built into the hill with an amazing view of Lake Como.

The highest pedestrian bridge in Singapore looks like a series of undulating waves rising between two public parks.

This stone throne invites adventurers to observe breathtaking views of the Peak District.

This natural history museum houses one of the world's largest rat kings, a terrifying jumble of tangled rodents.

A tribute to all the green-thumbed workers who tend London’s public parks and gardens.

This centuries-old pub boasts a collection of more than 4,500 snippets of neckties from around the world.