Cala Antena is a small and cozy beach, that could be one of the most beautiful ones in Mallorca. Unfortunately there are several big (and ugly looking) hotels close by. In the summer this beach is very often too crowded, if you have the possibility to stay on a boat this will be definitely a good choice. I would recommend you visit this beach in the off-season. If you swim about 200m away from the shore you will find a beautiful grotto.