The Celtic tree calendar was created 2000 - 3000 years ago.

The Celts assigned special properties and powers to tree species and related them to people.

The Celtic tree circle in Vils consists of 22 different tree species to which human characteristics have been assigned.
Through the respective date of birth can be found out which tree and character traits are attributed to one. However, the connection between tree and man is not proven to this day.

The Celtic tree circle or "Vils tree trail" is also intended to deepen the knowledge about the native trees in a playful way.

In the immediate vicinity of the Celtic tree circle is a viewing platform and offers the opportunity to observe the river-dwelling bird species on the Vils.