Belfast's most striking backdrop looms dramatically above the north of the city. Its craggy skyline rises 360m to the sheer cliff face of McArt's Fort, named after 16th Century chieftain Art O'Neill. This prominent landmark's instantly recognisable sillhouette is known locally as Napoleon's Nose, and the hill itself is pockmarked with those eponymous caves. Marked trails, suitable for all walking levels (we suggest you start your energic stroll from Belfast Castle), guide you to the summit for unparalled views stretching all the way to the Mountains of Mourne - it's as though a map of Northern Ireland has been unfolded before your eyes.