There are some government allowed routes that go to the West, but the usual one is just around the two main cities (Ashgabat and Mary) and then crossing the desert to that gas fire crater.
thats what I did, entered from the east from Bukhara (Uzbekistan) and left again to Uzbekistan but in the Khiva border.
Not sure how’s the caspian sea there, but the only time I saw it , in Azerbaijan, didn’t look very clean to swim.
Some other fast swims today include a new commonwealth record by Duncan Scott in the 400m free and a European record in the 100m IM by Marchand. Watch out for some quick swims in the 200m free and 200m IM later on.