The southern coast is another contrast, with the limestone plateau and cliffs of the Castlemartin peninsula, the steep-sided wooded valleys inland from Amroth; the Bosherston lakes — now, like much of the coastal strip, in the care of the National Trust — and the tourist resorts of Tenby and Saundersfoot.

Between the western and southern areas of the National Park lies the Milford Haven waterway, where the tranquil Daugleddau estuary feeds into one of the finest natural deep water harbours in the world.

In 2011, National Geographic Traveler magazine voted Pembrokeshire the second best coastal destination in the world for sustainable tourism.

[5][6][7] In January 2016 the Authority launched the "Changing Coasts" project to document the way the coastline has changed as a result of recent winter storms; the project invites visitors to submit photographs taken (at any time of day) from fixed points; a pilot study will be carried out at Abereiddy.

The Authority's purposes are to conserve and enhance the National Park, and encourage the public to enjoy and understand it.

In pursuing these purposes, the authority has a duty to foster the social and economic well-being of the communities within its boundaries.