Burgruine "Alter Turm"

Aach, Germany, Germany

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Burgruine „Alter Turm“ in Aach is the remains of a small early medieval Ringburg (enclosure castle) perched on a 35 by 30‑meter rocky plateau at about 539 meters above sea level on the edge of the Eigeltinger Tal, just northeast of the town of Aach in the Konstanz district of Baden‑Württemberg, Germany.

The fortress, built between about 990 and 1020 as a single, isolated stone tower with a polygonal base inside a ring wall, is one of the earliest known castles in the region and is now unusually well‑preserved because it was abandoned in the mid‑12th century and never later rebuilt or overbuilt.

Today the main surviving feature is the lower part of the former tower with its characteristic salian‑style ashlar masonry, which still stands several meters high, while the surrounding ditch and earth walls form a quiet, compact ruin visible from nearby paths and popular mainly as a short historical stop for hikers in the Hegau landscape.