Tucked away in a stunning, narrow valley, you'll find one of Iceland's oldest swimming pools, a real local treasure. To reach it, you'll take a lovely 15 to 20-minute walk along a rocky path that follows a stream, a small adventure in itself. The pool is fed by a natural spring, so the water is lukewarm rather than hot, offering a refreshing dip surrounded by incredible mountain scenery. It's a beautifully raw and authentic experience, a step back in time away from the more polished geothermal spas.