Where is the dotted hole in LeafGreen?

go to the six island use your town map and at the bottom left corner you can see a little dot that's were it is.
Dotted Hole is located in Ruin Valley on Fortune Island, the sixth island of the Sevii Islands.
It's a series of caves that have a hole in each direction. you'll find the Sapphire if you follow the braille instructions in the middle. use cut to open the door.