Development of 16 villas In Playa Honda. This is the last one. Playa Honda is a semi-urban beach with a wide promenade located on the shores of the Mar Menor, which is a saltwater lagoon, located between Cartagena and La Manga del Mar Menor. It is a quiet area but with a lot of life since it is surrounded by bars and restaurants. Cartagena is 15 minutes away by car.