This was due to its geographic importance on the trade route for merchants to and from Russia.edit Sights and ActivitiesCastle RuinsSt. John's Churchedit Events and FestivalsThe Viljandi Folk Festival which is held in the summer is a must for visitors and lovers of folk music.edit Getting ThereBy TrainEstonian Railways provides daily connections to/from Tallinn daily, taking about 2.5 hours.By Boa