Hundreds of stone stairs and a winding medieval bridge connect this haunting Spanish island to the mainland.

Avant garde house of Pierre Cardin on the Cote d’Azur.

The construction of a tram line unveiled hidden remnants of the old medieval city.

The largest underground church in Europe.

This whimsical winery by Antoni Gaudí looks ripped from the pages of a fairytale.

A fortress on this island housed the mysterious prisoner known as the "Man in the Iron Mask" for more than a decade.