Által-ér is a stream which flows through Tata, and it gains up the water coming down from the
surrounding Hills. It is the water-collector of several creeks and sources so that it creates a large
habitat-system for societies living requiring water.
There is a very valuable bog area (namely: Tófarok) which is mostly wet throughout the whole
year. Dominant plant communities are fen forests, (e.g. Alnus glutinosa, Salix alba, Salix fragilis,
Salix cinerea). In a small spot there is a reedbed as well. This part of the area is quite a diverse
habitat of the site.
“Által-ér” is a little stream which had been dammed up in the 15th century in order to create a
water stocking pond. It was also used for extensive fish breeding. The stream has remained the
basic supplier of the “Old-lake” even for today. The size of the lake is 219 hectares. On the
shore the dominant plant communities are pine-trees and different species of ferns (For example:
Dryopteris filix- mas and Dryopteris assimilis).