Rivers deliver sediment to the coast, where it can be reworked to form deltas, beaches, dunes, and barrier islands. The coastal zone is that part of the land surface influenced by marine processes.

If you're a keen photographer and beach lover then submit your photos to our BBC Wales Nature Flickr group. What are these? Search term: BBC © 2014 The BBC is not ...

South Africa’s coastline is studded with hidden gems – charming small towns that offer pristine beaches and breathtaking ...

The city, known as the ‘Gateway to the Tropics,’ offers a laid-back lifestyle with plenty of outdoor and cultural activities ...