the.com/caspian sea

means A vast, landlocked saltwater lake bordered by Russia, Kazakhstan, Turkmenistan, Iran, and Azerbaijan — technically a lake, but called a 'sea' for its size and salinity.

from Named after the ancient Caspi people, who lived on its southwestern shores in antiquity and were noted by Greek historians like Herodotus and Strabo. The Caspi themselves faded from history, but their name stuck to the water beside them — one of the oldest surviving place-names in the region, outlasting the civilization that gave it.