Sundhöllin is the oldest swimming pool in Reykjavík, located in the city center. Built in 1937 and renovated in 2017, it offers both indoor and outdoor pools, hot tubs, saunas, and a children's pool. Designed by architect Guðjón Samúelsson, it's a popular spot for locals to relax and unwind. With its geothermal heating, Sundhöllin provides a spa-like experience right in the heart of the city. Whether you're looking to take a dip or just soak up some Icelandic vibes, this historic pool is a must-visit destination in Reykjavík.