Lake Sevan is one of the largest freshwater alpine mountain lakes in the world. The beautiful landscape and the crystal water serve nice preconditions for excellent rest. The lake is also famous for its peninsula and medieval church complex built in 874. It is worthwhile to climb up the many stairs for the view and the green khachkars. They were carved from a plentiful local green stone and stood out from the others which are all made of tuff (local stone).