Estonia is full of small quirky sights and this medieval monastery is just one of them. It was original build in 14th century by dispossessed monks from Latvia. Later it was rebuild to a fortress, a state it survived despite numerous overtakes until a clock was installed in the tower in 18th century and lightning struck, which left the monastery partly burned down. Today the monastery is under restoration, but is still a full access ruin. Wobbly wooden staircases lead up to tower and you can even have a look in the dungeon - but be careful, there are lots of pitfalls.