This medieval sanctuary's tree-framed door looks like a portal to a mythical realm.

At the top of the hour, figures of the London department store's two co-founders emerge and bow to each other.

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

This overlooked street light once served as a KGB dead letter box.

Tucked away behind the mansions of Mayfair, this picturesque garden is a hidden London treasure with a spooky past.

This sculpture, residing in a quiet corner of a London park, honors the victims of 9/11.

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

The bronze uniforms commemorate the vital role of women during World War II.

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

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

Outside of one of Britain's most renowned social clubs, a step installed specifically for the Duke.

Just across from the "Last Supper" painting is the famous painter's vineyard, a gift received for creating the masterpiece.

Small on the outside, big on the inside, this church is an astonishing act of visual deception.

The secret medieval communication system will whisk your words above the noise of the crowd.

Milan's duomo is covered in beautiful carving including a curious "dinosaur-like" beast.

Before there were doorbells this bronze ear was installed for visitors to announce their arrival.

This curious building hides eclectic details like medieval gargoyles alongside naked angels and Art Nouveau mosaics.

An exclusive waiting room built for the royal family in the 1920s is hidden in Milan’s central station.

The train platform where Jews were sent to concentration camps is now preserved as a Holocaust memorial.

A fake medieval village in the middle of Turin.

Step inside the first house designed by Catalan architect Antoni Gaudí, considered to be one of the first Art Nouveau buildings.

Week-long block party becomes a competition for the best decorated street.

This fountain was designed to honor the man who helped bring water to Barcelona.

Possibly the oldest church in Barcelona, this basilica has its pagan and Christian mythologies all mixed up.