Ahtialanjärvi lake is the most varied bird lake in Tampere region. 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. It's also part of the nationally valuable FINIBA-area.
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, there is a campfire site and Birgitta trail.
There is another observation tower at the shore of Ahtialanjärvi, too. It's located just next to Virta-campus and operates as a bus stop at the same time. That's one of the ways how the school has wanted to bring nature closer to the students.