1. Oviedo Cathedral
The Cathedral of San Salvador is the anchor of the city, famous for its single Gothic tower that pierces the skyline. Unlike other cathedrals that aim for symmetry, this one is famously unbalanced, a quirk that has become its signature. It was a major stop for pilgrims on their way to Santiago—the saying goes that he who visits Santiago but not Salvador "visits the servant but not the Lord."
Inside, the nave is a cavern of stone that feels ancient and heavy. The retable behind the main altar is a masterpiece of storytelling in wood, but the real draw is the atmosphere of centuries-old devotion that permeates the walls. You can trace the architectural styles from the pre-Romanesque Cámara Santa to the Baroque chapels, reading the city's history in the changing masonry.
Among all Oviedo attractions, this is the one that demands your attention first. It is not just a church but a complex of holy sites that defined the Kingdom of Asturias. The square outside offers the best angle to appreciate the flamboyant spire, especially when the evening lights turn the stone a warm gold.