Ordinskaya cave

Ordinskaya or Orda cave, Russia's longest underwater cave, is also Eurasia's second-longest underwater cave and the world's largest underwater gypsum cave. It's located beneath the western Urals, near the settlement of Orda in the Perm Region, and is a cave diving paradise - as you might expect. The underground lakes total more than 50,000 square meters, but only 4,600 (300 on the surface and more than 4,000 beneath) have been explored and are dive-ready. Because of the gypsum that filters the water, the water is extraordinarily clean, with visibility ranging as far as 46 meters. However, diving here is extremely cold – the average underwater temperature is a chilly 4-6 degrees Celsius. This is one of the best dive sites in Russia that you must visit when you have a dive trip.

Location: Perm region, Orda village, Russian