The phrase "pristine shoreline" refers to a coastline that is untouched by human activity or pollution and remains in its original, natural state. Full definition
The move is an attempt to reverse damage to the once pristine shoreline of the island, according to president Rodrigo Duterte. (breakingtravelnews.com)
Snorkel and kayak along pristine shoreline and be awed by the underwater acrobatics of sea lions (travcoa.com)
In some locations these hulks are already leaking oil, threatening pristine shorelines, popular beaches and breeding grounds for fish. (newscientist.com)