Nuevo Baztán This town was founded in the 18th century by Juan de Goyeneche, who commissioned its design from the architect José de Churriguera. Its old town has been declared Property of Cultural Interest.
O Cebreiro On the French route of the Pilgrim's Route to Santiago de Compostela, O Cebreiro has a Grail some consider to be sacred and others to be miraculous.
O Grove On old maps, O Grove was an island. Today, it is joined to the mainland thanks to the south-westerly winds, which have slowly gathered sand to form the isthmus of the beach of A Lanzada.
Obanos Every two years this village in Navarre celebrates the Mystery of Obanos, a legend whose origins go back to the Middle Ages.
Ocaña Its urban centre, with a medieval layout, large mansions, palaces, convents and churches, is one of the most important throughout Castilla-La Mancha.
Oia Between Baiona and A Guarda is Oia, where the coastline stands firm against the force of the ocean. This spectacular sight can be seen from the mountains, where wild horses graze freely.
Olite It is a Historic-Artistic Site where traces of a Roman and Gothic presence can be found in its walled enclosure and in the splendour of the medieval court of Carlos III in its castle-palace.
Oliva Bordering on the province of Alicante, Oliva is the second most important town in the region of La Safor.
Olivenza By rule of the 1297 Alcañices Treaty, Olivenza belonged to Portugal until 1801. Both Spanish and Portuguese monuments were restored thanks to a municipal initiative.
Olot It is the capital of the region of Garrotxa. The medieval buildings that made up this town were destroyed in the 1427 and 1428 earthquakes. At present, the most remarkable feature of the city is its intense cultural and artistic life.
Olvera One of the most characteristic towns in the mountains of Cadiz. Set atop a spur, the whiteness of its houses reflects the splendour of the sun of Andalusia.