Immenhausen is bordered by the villages of Grebenstein to the north and west, Espenau to the south, Fuldatal to the southeast, and the unincorporated Reinhardswald area to the east.

Remnants of Immenhausen's original protective wall (Stadtmauer), which encircled the entire town in the thirteenth century, can still be seen today.

[5] In 1522, Bartholomaeus Rieseberg, a student of reformist Martin Luther, gave his first evangelical sermon in Immenhausen's St. George church.

In 1958, the second volume of a two-volume Gutenberg Bible from Rieseberg was discovered in the attic of the parish house in good condition.

In 1987, the Glasmuseum, detailing historical glassmaking practices of the region, was opened in a repurposed generator building.