This place is AMAZING and you can easily do it as a daytrip from Kraków and also spend some time at Štrbské Pleso lake.
Take the 6:25am Majer bus from Kraków bus station to Zakopane arriving 8:25. Note, no real places to eat at the Zakopane station. From here take the 9:05 Strama bus to Poprad getting off at Tatranská Lomnica station at 10:20.
From here it’s a 15 min. walk to the ski center where you need to exchange your home-printed tickets for a plastic card at the “Info center”.
A cable car operates from the lower station to mid-station Štart, and from there a cable car continues to Skalnaté Pleso. From here the unique red suspension cable car goes 900m further up to Lomnicky peak.
Get your tickets for the mountain gondola/cable cars on the official High Tatras website (GOPASS Slovakia) exactly six days in advance which is the first day they go on sale. Note the time for the final gondola to the Peak is the time you must be at Skalnaté Pleso, the terminus of the SECOND of the three cars that you will take. So,all in all buy Lominsky Stit tickets for 12.10pm or later…)
Atop the peak, you will have amazing views and you spend 50 mins… there is coffee and other drinks, and only strudel to eat.
Make your way down the three cable cars and walk back to Tatranská Lomnica station. You can take the Tatras Electric Railway (Google the Slovak Railways site) changing at Stary Smokovec to Štrbské Pleso lake. Allow an hour or more to walk around it, maybe eat here, there is a Kempinsky hotel and many other local places. Then the cog railway to Štrba. Don’t count on eating at Štrba as it’s a dump. Plenty of cozy nice restaurants in the mountain towns along the railway.
Book the 18.30 LEO minibus from Štrba to Krakow on their website.
ALL tickets are available online and your can print them out.
Remember Slovakia uses the euro.