The Gleniff Horseshoe is a stunning 10km loop in Sligo that offers epic views of the Dartry Mountains and Donegal Bay. Whether you choose to drive or walk the loop, you're in for a treat. Just be sure to resist the urge to climb up to Diarmuid and Grainne's cave unless you're a seasoned pro. With its glacial valley origins and easy access from nearby towns, the Gleniff Horseshoe is a must-visit spot for nature lovers and adventure seekers alike.