Don't let the name fool you; 'Ugly Puddle' is one of the most stunning sights in the Highlands. After a bumpy but rewarding drive on a mountain road, you'll find yourself on the edge of a massive explosion crater. A short, 5-to-10-minute walk uphill from the car park reveals a breathtaking scene: a serene, deep-blue lake cupped by steep, crimson-red slopes. For the best views, take the easy 90-minute trail that circles the entire rim, offering incredible panoramas of the surrounding otherworldly landscape.