The hang
Praia da Adraga is near Almoçageme, in Sintra. The guide that calls it something of a secret also says it is less of one every year, and tells you to avoid weekends. At low tide you can explore a string of caves at the southern end. The water is very clean, on a Blue Flag beach, and the waves are often strong, so it is better for looking at than swimming in. There is a well-regarded fish restaurant on the beach. The first car park is free; when it is full, the overflow costs €3.50 an hour. We measured 292 metres of sand.

