The house where a Danish physicist discovered the connection between electricity and magnetism.

Site of the first radio and telephone broadcasting companies in Copenhagen.

Copenhagen's celebrated theme park and gardens.

An Italian crevasse filled with abandoned buildings gives visitors a look at the world without humans.

'The Letters of Utrecht' lays out a ribbon of poetry one letter at a time, with no final verse in sight.

The cutest way to stay safe in traffic.

Atop this former dutch railway office sits an interstellar work of art.

The world's largest bicycle shelter can hold more than 12,500 two-wheelers.

A typographic tribute to the many comedic greats who make Great Britain laugh.

A stretch of land where the sour-sweet vegetable is cloaked in darkness and grows so fast you can hear it crack, squeak, and pop.

This former charity hospital for elderly clergy houses some of Seville’s most treasured paintings.

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

This bronze statue stands throughout the year and illustrates an urgent message about the environment.

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

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

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

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

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

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

A 16th-century Andalusian palace.

The world's largest wooden structure.

A contemporary art installation housed within a Gothic cathedral.

This network of narrow, medieval passages has the most delightful name.

A Reformation-era fiery figurehead once denoted this location as a print shop.