Deep-water soloing (DWS) (also known as psicobloc) is a form of solo rock climbing, practiced on sea cliffs at high tide, that relies solely upon the presence of water at the base of a climb to protect against injury from the generally high difficulty routes. Although this is viewed as a relatively new style of climbing, it probably originated in the late 1960s or early 1970s in Dorset, Southern England or Majorca. Real development of the style began in the mid-late 1990s, and is progressing to this day.
This type of climbing is most famously practiced on the coasts of Dorset and Devon, but also in the Calanques near Marseille, around the Southern Pembrokeshire coast, parts of Ireland, Sardinia, Majorca, Spain, Greece, and many other climbing areas.
DWS on Mallorca: