Kashin developed as the centre of an appendage principality of the Tver Grand Principality which often became involved in the struggles between Moscow and Tver. It is also associated with St Anna of Kashin, a member of the Ryurikid dynasty who married into the Tver royal family and later became a nun in Kashin. Today Kashin is a quaint provincial city and one of its best features is the River Kashinka which flows around the centre in the form of a heart. You can combine a visit to Kashin with a trip to Kalyazin.