The name of the village literally translates as "large steep hill," and refers to a nearby tumulus (locally known as the Leeberg) that is believed to have been erected by the people of the Kalenderberg culture, probably around 600-500 B.C.

With 55 m diameter and 16 m height remaining, the Leeberg is the largest hill grave in Central Europe.

Taking erosion into account, its original size can be estimated at 18–20 m height and a base diameter of about 70 m. Because of its unusual size it has apparently defied graverobbers and also the more recent efforts of "amateur archeologists."

Although it is beyond doubt that this huge tumulus must be a powerful local chieftain's burial place, no serious attempt at scientific investigation of the Leeberg has been made either.

Großmugl opened a permanent star walk installation designated for astronomical observations with the unaided eye.