Here in Italy the best diving sites start at 35-40m and are wonderful down to 60m. This was the standard diving done RECREATIONALLY when I was young. We started using a twin tank (and a CC rebreather) since the first OW course, and the rec limits, at the time, were 50m, with buddy and with "light" deco (which means the deepest stop had to be 6m).
Was it worth the risk? I think yes, as only at those depths (40-50m) you see scenarios like these ones:
Secca Isuela, Punta Chiappa, Portofino (near Genoa):
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Secca del Toro, Favignana (a small island south of Sicily):
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Red coral inside caverns at Capo Caccia, Sardinia:
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Another reason to visit Sicily. Thanks, Angelo. Once again, you've schooled me.