Newcastle sits where the Mourne Mountains sweep down to the sea, creating one of Ireland's most dramatic coastal settings. The long sandy beach is backed by the distinctive profile of Slieve Donard, Northern Ireland's highest peak at 2,789 feet, accessible via paths starting from the town. The Victorian promenade offers traditional seaside pleasures, while the town serves as a gateway to the Mournes for walking, cycling, and exploring mountain scenery. Royal County Down golf course, regularly ranked among the world's finest, challenges players against a backdrop of sea and mountains.