First bathe in the lye pools - then cover yourself in the black mud,let it dry and finally go wash off in the sea! Beauty spa for free ;-)
You can get there by car by following the signs to 'solnitsi' before reaching Sarafovo from Burgas or by taking a cycle ride along the beach from Burgas. There are a couple of small cafes there and the annual Salt Festival (usually held in August is growing in popularity. During the summer months there is also a small train that takes tourists around the salt pans.