Lake Sevan
Sevan was one of the three great lakes of the historical Safavid Empire, These there lakes were called the Seas of Armenia. Sevan is the only one within the modern day Republic of Armenia. Lake Van and Lake Urmia are the other two great "seas" of historic Armenia. They  are located in Turkey and Iran. Lake Sevan is considered the "jewel" of Armenia. It is "recognized as a national treasure" in the country. The 2001 Law on Lake Sevan defines the lake as "a strategic ecosystem valuable for its environmental, economical, social, scientific, cultural, aesthetic, medical, climatic, recreational, and spiritual value."