Ojos del Salar
Depending on your tour operator, they may or may not let you jump into these on the way to Cejar. You can always rent a bike from town and cruise out here on your own. Heading towards Cejar, don't jump into the ojo on the right...it's said there is a rusty car down there with sharp metal parts and you don't want to hit it. Stick to the ojo on the left, and brace yourself for how salty the water is. You won't enter the water very far no matter what.