"To explore the coastline" means to travel and investigate the area where the land meets the sea, usually to discover new places, study the environment, or enjoy the views. Full definition
The crystal - clear water provides ideal conditions for exploring the coastline and all of its marine life with a snorkel. (loveholidays.com)
So whenever you are doing a road trip or you just explore the coastline, you always have the opportunity to go for a quick swim. (wetravelaroundtheworld.com)
A good selection of water sports equipment means guests can learn to windsurf right from the beach in front of the villa, or even explore the coastline on a jet - ski. (thevillaguide.com)