Hidden behind a wall, Spanish nuns distribute their signature sweets on a revolving tray.

This Michelin-starred restaurant sheds light on a rare period of cultural and culinary tolerance in Cordoba’s past.

Madrid's last horchata kiosk is a blue-and-white beacon of refreshment.

Order cookies baked by cloistered nuns in a 400-year-old monastery.

One of Madrid's oldest trees, with a long and colorful history, resides in El Retiro Park.

An ancient Egyptian temple in the middle of Madrid, Spain.

The earliest known map to show America, discovered by accident at a Paris bookshop.

In the fictional world of Kcymaerxthaere, celestial wonders marked a portal to a powerful route of travel at this site in Madrid, Spain.

Part of the medieval watchtower is displayed in an otherwise ordinary parking garage.

Abandoned for decades, trains still pass through the now-restored remains of one of Madrid's first metro stations.

The morbid items in this small and hidden museum are not for the weak stomached.

A unique exhibit lets blind people experience famous works of art and architecture with their hands.

This once-forgotten oasis in the middle of Lisbon was first created over a century ago quite by accident.

A 16th century chapel decorated with bones, skulls, and entire bodies hanging from the wall.

Hidden beneath a beautiful overlook you’ll find the history of the city depicted in comic strip format next to a pay toilet.

Ring the bell to enter a bar that looks equal parts museum and old curiosity shop.

A small town celebrates its cash crop with a giant highway sculpture.

The medieval castle built as headquarters for the Pope's secretive Knights Templar.

An early work of the architect Álvaro Siza Vieira, these swimming pools blend into the beach.

A small but charming botanical garden that contains many exotic plant species.

Building owners can take out tiles for free at this repository for historic building materials.

One of the most beautiful bookstores in the world hides a neo-Gothic interior behind an art nouveau facade.

This giant sculpture made of trash is a critique of society's wastefulness.

An abandoned tuberculosis hospital said to be haunted by the patients who died within its walls.