On the bike

Przesieka is a place well known to enthusiasts of both road cycling and off-road cycling.

This is where one of the most difficult road climbs in Poland begins – the climb to the Karkonoska Pass.
More - https://climbfinder.com/pl/podjazdy/przelecz-karkonoska-karkonosze-pass-przesieka 

For mountain biking enthusiasts, there are 14 single tracks in the area. You can also cycle to the neighbouring towns of Jagniątków and Borowice, which is a great way to explore the Jelenia Góra Valley.
More - https://www.przesieka.pl/wycieczki_rower.html