The first and so far only prehistoric open-air museum in Hungary can be visited in Százhalombatta from April to the end of October. The museum is located 30 km south of Budapest near national road no. 6.

Authentic reconstructions of buildings unearthed from the Bronze and Iron Ages have been raised over 6 ha, at the feet of the Iron Age tumuli, from which the town got its name. Plants characteristic of the period as lentil, pea, and horse-bean are cultivated in the kitchen-gardens.

The visitors can be active participators in the prehistoric everyday life: they can weave, form vessels, wattle a fence, make daub walls, get acquainted with prehistoric handicraft techniques and take home their own products.

The 2700 years old oak-construction grave chamber measuring 5.5 x 5.5 m survived in a nearly intact state due to the remains of the funeral pyre taken inside. The ashes of the dead were scattered over the floor of the funnel-shaped passage leading to the grave chamber. The architectural reconstruction re-created the original geometry of the mound. Inside the tumulus, a multimedia-show with sound and light effects tells about the burial rite of the age.