Diving in Swiss Lakes
It is true that Switzerland is landlocked. However, there are plenty of diving opportunities in the beautiful lakes of Switzerland.
On my two day visit to Zurich, I dived in two different lakes (Lake Lucerne and Lake Walensee). Both were interesting dive sites, and well maintained by the local diving community.
I dived with Tauchsport Käser Zurich and they were wonderful ! If you ever get an opportunity, go ahead and explore the lakes in Switzerland.