The Great Salt Plains Lake is a really big lake in the state of Oklahoma. It's a place where there's a lot of salt in the ground and in the water. Have you ever tasted salt before? Well, this lake has a lot of it!
The Great Salt Plains Lake was formed a long, long time ago. A river used to flow through this area, and it brought a lot of salt with it. Over time, the river dried up, but the salt was left behind. This salt formed a big field of salt in the ground, and whenever it rained, the water would dissolve some of the salt and form the lake.
Now, this lake is a very special place because it's the only place in the world where you can find a certain type of crystal called "selenite." Selenite crystals are really cool because they look like big, sparkly diamonds, but they're made out of salt! People come from all over to see them and even dig for them.
But you have to be careful when you visit the Great Salt Plains Lake because the ground can be really slippery, and the salt can be sharp. You don't want to get hurt! But as long as you're careful and wear the right shoes, you can have a lot of fun exploring and learning about this amazing place.