Located right in the heart of Lappeenranta, the Lappeenranta Fortress combines culture with geology. The construction of the Fortress on the First Salpausselkä’s ice-marginal formation began in the 1720s and the old building where the South Karelia Museum is situated was constructed almost entirely from limestone boulders from nearby Ihalainen quarry. Boulders feature e.g. wollastonite lines. At the harbour you will find the Saimaa Geopark sign, which tells you about the geology of the area.