Fort IIa w Poznaniu

Fort IIa is a trapezoidal military structure featuring five traverses within the surrounding embankment and a dry moat measuring 10 meters wide and 6 meters deep. The potern walls contain electrical installations, and although the moats have been cleaned, they remain filled with water.

The fort was built between 1887 and 1890 and originally named after Heinrich Thümen. It was constructed during a period of intensive fortification development in the region.

Today it serves as a gathering space for scout groups and has housed the Poznań Society for Nature Protection 'Salamandra' since 1998. The location brings together people interested in local history and environmental conservation.

The site is accessible to visitors, but be prepared for uneven terrain and wet conditions throughout the grounds. Wear appropriate footwear and allow time to explore the various sections of the structure.

In the late 1990s, researchers discovered the first recorded occurrence of Peltigera monticola lichen in Poland within these grounds. This botanical rarity makes the fort an interesting destination for nature observers and researchers.