Ansu Lake, a breathtaking high-altitude tear-drop-shaped lake, is a challenging but rewarding destination in Pakistan's Kaghan Valley. Accessibility involves a strenuous 8-10 hour trek from Lake Saiful Muluk, often requiring a horse ride for part of the way followed by a steep hike, making it unsuitable for those with mobility issues; proper trekking gear and a good fitness level are essential. A guided visit is highly recommended due to the difficult terrain, unpredictable weather, and lack of facilities, with solo visits being dangerous and discouraged. The lake is only accessible during the summer months, typically from late June to early October, as heavy snowfall closes routes in winter. Approximate costs can range from PKR 5,000 to 15,000+ per person for guide fees, horse rental, and transport depending on the duration and services. Visitors should be prepared for high-altitude conditions, rapid weather changes, and carry all necessary supplies as there are no facilities at the lake.