The church of St. Olaf was built in the year 1782 and is located in the place of an old chapel built in 1663. The shrine of Yläne is a combination of a cruciform church and a basilica, and is seated for 600 people. It was designed by Mikael Piimänen. The organ of the church is one of the oldest in Finland. The church site, cemetery and near vicarage are defined as national built herigate by National Board of Antiques.
The city walls of Avila were built in the 11th century to protect the citizens from the Moors. They have been well maintained throughout the centuries and are now a major tourist attraction as well as a UNESCO World Heritage Site. Visitors can walk around about half of the length of the walls.
The layout of the city is an even quadrilateral with a perimeter of 2,516 m. Its walls, which consist in part of stones already used in earlier constructions, have an average thickness of 3 m. Access to the city is afforded by nine gates of different periods; twin 20 m high towers, linked by a semi-circular arch, flank the oldest ones, Puerta de San Vicente and Puerta del Alcázar.