at the top of a hill, it stood overlooking the bay of Nice from the 11th century to the 18th century.

ular Gambling Den. The ornate gambling house has been featured in multiple James Bond movies and is perhaps the most iconic building in the tiny principality of Monaco.

med for its international film festival. Its Boulevard de la Croisette, curving along the coast, is lined with sandy beaches, upmarket boutiques and palatial hotels. It’s also home to the Palais des Festivals et des Congrès, a modern building complete with red carpet and Allée des Étoiles – Cannes’ walk of fame.

lia is a large unfinished Roman Catholic church in Barcelona, designed by Catalan architect Antoni Gaudí.

its baroque Nuestra Señora del Pilar basilica, a famous pilgrimage site with a shrine to the Virgin Mary and multiple domes. Mudéjar-style landmarks, combining Islamic and Gothic architecture, include the Aljafería, an 11th-century Moorish palace, and the Cathedral of the Savior, begun in the 12th century.

ragon, Spain. It is part of the World Heritage Site Mudéjar Architecture of Aragon.

Castile-La Mancha, Spain, built by the Catholic Monarchs (1477–1504).

ant boulevards and expansive, manicured parks such as the Buen Retiro. It’s renowned for its rich repositories of European art, including the Prado Museum’s works by Goya, Velázquez and other Spanish masters. The heart of old Hapsburg Madrid is the portico-lined Plaza Mayor, and nearby is the baroque Royal Palace and Armory, displaying historic weaponry.