The topiary maze at the Habsburg hunting lodge.

Vienna's diversity-themed traffic lights were inspired by the Eurovision Song Contest.

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

A quiet, semi-secret square with statues of Mahatma Gandhi, Virginia Woolf, and a conscientious objectors stone.

The wooden telephone box hidden away in London's Piccadilly was the original prototype of the iconic kiosk.

These ornate arches show how the course of the River Thames has changed.

The barrel-made lookout from Shackleton's final ship is tucked away in the crypt of one of London's oldest churches.

Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.

An architectural oddity hides in plain sight on this iconic London bridge.

Ship-sized kinetic sculptural fantasy.

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

An incarceration museum on the spot of possibly the oldest prison in England.

The largest of London's subterranean rivers and once a mad, bad center of London life.

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

The broken skateboards that became a poignant memorial to a murdered skater.

One part local history, 99 parts gruesome haunted house.

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

A network of bells in the pubs and restaurants around Westminster alerts politicians when it's time to cast their votes.

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

A unique collection of gilded age mechanical pianos.

Seven mini rowhouses fill the gap between 54 and 70 Westerstraat.

Europe's first floating restaurant is home to a hilarious legend.

Some 80,000 Delft Blue tiles line the inside of this Amsterdam walkway.

Museum preserving torture methods from the past.