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.
Oña A remarkable village since the times of Fernán González, it grew under the protection of the monastery of San Salvador and the grace of the monarchs.
Oñati Located at the heart of peninsular Euskadi (the Basque Country), this town takes up a beautiful valley surrounded by green mountains on all sides except the southern one, where the giant Aloña limestone formation sits.
Onda In the spurs of Sierra Espadán we find Onda, a historic village in the interior of Castellón, which holds an important monumental heritage, and has a long tradition in the production of ceramics.