Journey through this open museum where even employees remain true to period.

The world’s oldest surviving single-arch railway bridge.

Home to the longest wooden escalators in the world.

A famous pilgrimage site that remains hidden in the midst of a city.

This Roman archeological site is hidden amid a 1930s housing estate.

The largest timber structure in Europe.

The remains of a Dominican friary, once one of the largest of its kind in the United Kingdom.

This century-old grotesque has a mysterious history and may not actually be a rabbit.

This sculpture commemorates a naturalist and an illustrator whose work was a forerunner to modern field guides.

This gorgeous space is England's largest independent library outside of London.

This building played host to some of the most influential minds of the Industrial Revolution and now serves as a reminder of the influence of Northern coalfields.

This building's name and a plaque are all that's left of what was probably the most important nightclub of the Madchester music scene.

An eerie collection of the surviving structures from a past celebration of the future.

Spain's largest bullring offers a unique glimpse at architecture and history.

The final resting place of the great navigator, or maybe his brother.

Its appearance in "Game of Thrones" may spur on the long-awaited restoration of this medieval shipyard.

A 16th-century Andalusian palace.

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

The world's largest wooden structure.

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

A curious carving hides on a marble column in the Mosque-Cathedral of Córdoba.

Touching this little fossil embedded in the wall of a grand mosque-cathedral may make your wishes come true.

Spain's unique Mosque-Cathedral has been a place of worship for both Muslims and Christians throughout its history.

This 86,000-square-foot artwork is the largest mural in the world to cover a dam.