My first trip to Nami-Nara in Nami Island! / Seoul, Korea
You can easily get there either by subway or train called ITX! Takes about 40 mins by ITX from Cheongryangri stn and about 1hr 20 mins from Konkuk station, line 2 where I live! You can get off at Gapyeong stn and take a 5 min boat to the island!
Recommendable for a short day trip with your friends :)