Okay, so imagine that there is a really cool lady named Benzaiten. She's awesome because she can do lots of cool things like help people with their art and music, and she can even control water! People in Japan really like her, so they built three special places called "shrines" where they could go to pray to her and ask for her help.
The first shrine is called "Enoshima". It's located on a big rock island in the ocean, so people have to take a bridge to get there. It's super pretty and has lots of cool statues of Benzaiten, plus you can see the ocean and beaches all around.
The second shrine is called "Chikubushima". It's also on an island, but this one is in the middle of a big lake! You have to take a special boat to get there, and it's really peaceful because there aren't any cars or loud noises. There are lots of little shrines inside where you can pray to Benzaiten and even buy special charms or souvenirs.
The third shrine is called "Itsukushima". This one is really famous because it's build on stilts in the ocean, and when the tide comes in the whole thing looks like it's floating! It's really pretty and lots of people come to see it, but it's also really important to the people who believe in Benzaiten because they can come and ask for her help.
So basically, the three great shrines of Benzaiten are special places where people in Japan can go to pray to the goddess Benzaiten and ask her for her help and blessings. They are all located in really beautiful spots and are important to many people!