Austria – Styria, Lower Austria & Burgenland
Eastern Austria has no big alpine diving lakes, but it has the waters where most Viennese divers learn and train. The Neufelder See in northern Burgenland, a flooded former lignite and gravel pit about 40 minutes from Vienna, has two dive bases, line-linked platforms down to about 20 m and an underwater figure park. The Erlaufsee near Mariazell, on the Styria–Lower Austria border, is the region's real mountain lake: clear in spring and autumn, with drowned trees, a steep wall and pike, but diving is allowed only in a signed zone with the ARGE Tauchen Dive Card because the Austrian Federal Forests own the lake. Near Graz, the Copacabana gravel lake in Kalsdorf is a shallow training site with a sunken Wolfgangsee excursion boat and a small plane. Lunzer See, Ratzersdorfer See, Schwarzlsee and the Soboth reservoir are smaller or less documented options. The famous Grüner See at Tragöß has been closed to divers since 2016; it is listed, marked as banned.