At first glance, the Caspian Sea appears as an ocean that stretches endlessly to the horizon, touching the shores of five countries. Yet scientists classify it not as a sea, but as Earth’s largest lake, a vast inland lake covering some 371,000 square kilometers, larger than Japan in size. Spread across Europe and Asia, it is bordered by Russia, Azerbaijan, Kazakhstan, Turkmenistan and Iran. Its vast expanse, distinctive chemistry and geopolitical importance make it one of the planet’s most captivating geographical wonders. From ancient Silk Road commerce to contemporary oil pipelines, the Caspian has deeply influenced the historical, economic, and ecological narrative of the region. Despite this, little is known to the world about its hybrid lake-sea status, lucrative caviar trade and important role in global energy politics.
Credit: Canva