Pop culture has helped to keep this iconic British building from being destroyed.

This Scandinavian island is the site of the first modern observatory.

This Swedish astronomical clock was in storage for almost a century before its glorious workings were put on display once more.

Largest island in the Baltic Sea experiences such idyllic weather that roses bloom in the middle of December.

This chimerical bridge/tunnel appears to dead end right into the sea.

The only surviving piece of Copenhagen's 16th-century defensive wall.

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

This contemplative sculpture made out of old machine parts is meant to be the first in a series of sculptures around the world.

The deepest metro station in the world.

340-foot statue built to honour the Heroes of the Soviet Union.

This is not only one of the oldest collections in Europe, but also possibly the most beautiful.

This bizarrely tree-like red skyscraper is one of the newer additions to Barcelona’s skyline.

A Roman bridge closed to car traffic in the 1990s now open to foot traffic.

A place steeped in history that may be best known as the set of a 1960 film.

32,000 tiny soldiers are posed in 23 historical settings.

Touching the iron railings of Tarragona's balcony to the Mediterranean is said to bring good luck.

An old wool-washing house filled with Fluxus contemporary art.

Living towers made of people that are now recognized by UNESCO.

This Roman arena once played host to bloody gladiatorial battles.

Long tunnels run under the ancient chariot racing circuit to the tower.

This beautiful spit of land was once the summer playground of the king of Spain.

This local emblem is the oldest and largest dragon tree in the Canary Islands.

The unexpectedly beloved remnants of a controversial thermal power plant.

On La Gomera, "Silbadors" communicate in a 4,000-word language of whistles.