La Restinga lies in the south of El Hierro. It’s very popular by tourists, and it is famous especially for diving.
It’s said, that La Restinga should be the best place for diving… but it is also said, that La Restinga is not the best place for beginners 
Of course there are some diving-clubs here, where all the equipment can be rented, if you don’t have yours with you.
La Restinga is also popular because of the weather… it’s summerly all year round.
So if you plan to visit El Hierro… and if you like diving, La Restinga would be a good choice.