Ahtialanjärvi lake is the most varied bird lake in Pirkanmaa area. The lake covers an area of 168 hectares. Ahtialajärvi is a nationally valuable lake for the national Natura 2000 conservation program. The observation tower is located near the center of Lempäälä.
The observation tower was built in 1999 by local people in Mattila and it is located at the highest point of the hill. From there you can enjoy a great view to Lempäälä and even to city of Valkeakoski and Tampere. Next to the tower is a campfire site and Birgitta trail.