Took a Sightseeing tour on a very comfortable bus from Vienna, visiting Baden, Mayerling,Heiligenkreuz(a medieval abbey,) then on to Seegrotte.Cost 44 euros. .(We did the same tour 8 years ago and it cost 39 euros then). The caves are a constant 9 degrees, so either take your coat or pay 50 cents for a blanket. You walk down a tunnel...
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