Looking to rent a sauna for a day next to waters (Bratislava)

Hi all,

I hope some of you could help me out little bit with my "funny" request:
I am looking to rent a sauna next to water for one day at next summer. Mission might be challenging but i am optimistic that it's not impossible. Especially with the help of all of you :-)

Criterias:
- next to water
- wood heated stove would be pop...electric goes also if must
- Special dream in addition to all this madness would be to have a possibility to do bbq on permises

Anyone?
Thanx in advance, have a great new year.

Best regards,
Tane