Place:
Feel free to visit a small forest, near Vaclav Havel avenue. You can find there a Cossack Mountain (75,5 m above see level), on which in 2012 were build viewing platform.
View from it allows you to see the entire Gdańsk Południe district, Orunia district, and even a wind farm or Gdańsk Bay :)
The forest is from a few years in the center of interest of people - link to the initiative to rescue him:
http://kozaczagora.bloog.pl/
Cache:
Small micro at the terrace(below last level).