Karpacz offers many ideal places for a date. You can go for a walk on one of the many mountain trails, visit Krucze Skały, or go to the atmospheric dam on Łomnica.
There is currently no Polish restaurant or shelter on Śnieżka, but there is a Czech bar where you can get something to eat and drink. However, make sure that this bar is open on the website: http://www.postovnasnezka.cz/
