For decades, Puerta del Sol has been illuminated by a giant, guitar-wielding bottle of sherry.

A medieval fresco which reminds visitors that death will come for us all.

This deconsecrated church has seen many uses, from a tobacco storehouse to a cinema.

A bronze statue of a low three-legged seat commemorates a piece of furniture that started a riot.

This painting of a beloved dog will be on display at the Scottish National Gallery at long as the museum exists.

This extraordinary Viking artifact has traveled throughout the city.

A quartet of brightly colored mythical beasts stand sentry at this gateway.

This impressive Gothic church dates back to 1244 and stands on the site of one of the first churches in Scotland.

An exceptional engineering feat that facilitates the migration of salmon upstream during their breeding season.

This Scottish tollhouse was a destination for clandestine marriages in the 18th and 19th centuries.

Perhaps the smallest monument dedicated to one of Great Britain's longest serving monarchs.

The home of two of Scotland's most important artists has been reassembled in the Hunterian Art Gallery.

A collection of unique objects showcasing the university’s achievements in the medical field.

A never-finished memorial to the heroes of the Napoleonic War has become "Scotland's Folly."

An extended zoological collection that doubles as a time capsule.

This huge concrete map of Scotland was built as a thank you gift from a Polish soldier.

Sip cherry liqueur at a bar dating back to 1840.

This little-known national museum houses over 40,000 works of art from across the world.

Eat the ultimate iteration of Portugal's most beloved pastry.

Located in the thermoelectric factory that once powered the entire city, this Portuguese museum is shockingly fascinating.

A museum dedicated to the centuries-old cave dwellings that housed marginalized communities on the outskirts of the former capital of Muslim Spain.

Mysterious texts covered in mystical symbols were found in caves at this site centuries ago.

Spanish architects used seized Muslim gravestones to rebuild parts of the fortress.

A masterpiece of Gothic-Mudejar design in Ciudad Real.