 The slope of the Teckberg formed by the Yellow Rock, a Schwammriff the Jura sea of bright lime.Under the "Gelber Fels", is the 31 m long and 45 m high Veronikahöhle, which is connected through columns with Verena-Beutlins-Loch.East of the Gelber Fels (Yellow Rock) three grave mounds indicate from the Hallstatt period (800-400 BC) the early settlement of the Teckberg.