Kaisereiche, Memorial tree in Cronenberg, Wuppertal, Germany

The Kaisereiche is an oak tree enclosed by a cast-iron fence within Burgholz State Forest near Wuppertal. It stands close to the Elberfeld-Cronenberg railway line and sits amid hiking paths that crisscross the forest.

Gymnasium students from Elberfeld planted this oak tree on June 14, 1871 to commemorate the founding of the German Empire. The monument embodies a defining moment in 19th century history.

Residents of Küllenhahn traditionally walked to the oak every 1 May to mark the day together in the nearby recreation area. The street named "Zur Kaisereiche" takes its name from the tree, and a hiking car park beside it is a starting point for walks in Burgholz State Forest.

A parking area nearby provides a convenient starting point for forest walks and explorations of the State Forest. Visitors can easily access several trails from this location.

The Burgholztunnel, opened in 2004, runs directly beneath the Kaisereiche; the oak stands above the road tunnel on the slope by the former Burgholzbahn line. The tree also gave its name to the street "Zur Kaisereiche" beside it.