What do the dead sea and the Caspian Sea have in coommon?

Both the Dead Sea and the Caspian Sea are notable for being among the saltiest bodies of water in the world, with high salinity levels that prevent most marine life from thriving. They are also both endorheic, meaning they do not drain into any ocean or sea, leading to unique ecological and geological characteristics. Additionally, both are located in regions with significant historical and cultural importance.