This museum housed in a former brothel explores the past and present of sex work in Amsterdam.

This unattributed sculpture in Amsterdam is hiding in plain sight.

A beautifully eclectic mix of architectural styles.

This 22-floor tower's Skydeck offers panoramic views of Amsterdam.

This historic Amsterdam bar used to accept sailor's monkeys as payment.

The world's only museum devoted to the wonders of fluorescence.

Established in 1638 to battle the Black Death, Hortus Botanicus Amsterdam is a treasure trove of rare flora.

The final resting place to 300 Victorian-era pets hides inside the city park.

Hidden in a grotto 26 feet below Nottingham's oldest hotel, this stylish subterranean drinking den is notoriously hard to find.

Ask nicely, and stewards of a centuries-old charitable tradition will give you free bread and beer.

These medieval tunnels provided water to the city above through centuries of civil war and plague.

Old Tudor home moved on thick iron rails to a new spot.

Probably the smallest museum in the world, housed in a disused phone booth.

A rare labyrinth-style path carved into a historic hill.

An ancient hotspot for spotting schools of fish.

Sometimes an island, sometimes a rocky outcropping connected to the world by a tiny suspension bridge.

A neolithic dolmen that was rebuilt after collapsing during the 19th century.

A legendary rocking stone, returned to its clifftop perch.

These mysterious mazes carved on the rock may be up to 4,000 years old.

Grab a cuppa at England's first and only domestic tea plantation.

The ruins of an 11th-century Norman castle with a rare, perfectly circular shape.

A 6th-century stone lies at the site of the mythical battle waged between King Arthur and his nemesis Mordred.

The largest greenhouse in the world is home to over one million types of plants.

A unique waterfall that some believe attracts the fairfolk.