Children's Beach

Going out from metro station Hydropark, you at once get on a fork: one road goes straight, other - right. You need the first. Following on this road, through 50 meters you'lll walk up to another fork: there will be Temple-pump-room ahead.
Here you can get some free water.

Then you should go round a pump-room to see a tab::

Yahoo! You're in place! It's time to look for boatmen :)