I would like to recommend you to travel to a little island called La Graciosa.
It is an interesting place because of its deserted beaches, it has no shops or restaurants, almost one or two little supermarkets. Now is very trendy to go there, so it is a little bit expensive, but it`s worth it. To reach there you will need to go by plane or boat to Lanzarote. Then you should catch a bus to get to a town called Órzola. You are nearly to get there. The last step is to take a boat, which last twenty minutes to arrive. When you achieve to be in the island, switch off your mobile phone, disconnect and have a relaxing holidays.