This abandoned limestone quarry now provides visitors with multiple, breathtaking viewpoints.

A tiny replica of the iconic London landmark hides on the side of the steel structure.

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

An old tram depot transformed into a vintage car paradise.

A narrow passage next to a cafe leads to a courtyard exploding with murals, tags, and paste-ups.

A surreal museum of extraordinary industrial objects.

These brass bunnies honor the rabbits that dominated the no-man's-land around the Berlin Wall.

A restaurant and observation deck built in a unique broadcasting antenna.

Berlin's old airport.

The most visited, and possibly most controversial, museum in Germany.

A tree-like building perches on its trunk in the Steglitz neighborhood of Berlin.

Art and a pun, all in one.

A tribute to the intrepid explorer and his crew who perished in terrible conditions on an ill-fated expedition to the Arctic.

One of the most photographed buildings in a city known for its Modernista architecture is an abandoned squat.

The last four extravagant street signs of London's historic banking street.

Ship-sized kinetic sculptural fantasy.

Wedged between two buildings at the Great Ormond Street Hospital is this secret music installation.

In this cobwebbed old operating theater, you can practically hear the screams of the unanesthetized patients.

Bronze sculpture celebrating the relationship between Churchill and Roosevelt.

A statue marks the exact spot where The Boy Who Never Grows Up made his first literary appearance.

After nearly 60 years, there's still a bear at Paddington Station looking for help.

Several plaster noses are hidden in plain sight around London's Soho neighborhood.

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

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