Focus Clinic, a popular laser eye surgery clinic in the United Kingdom, has gathered a list of 20 most popular winter travel destinations across the world based on Google search and ranked each by the number of times a city's hashtag was used on Instagram to determine its popularity on the photo-sharing app. Bern, a city in Switzerland, has been the most popular location on Instagram when the winter season sets in. Bern is known for its medieval landmark clock tower and stunning neo-Renaissance buildings, Bern is officially Instagram users' favourite winter city to upload in their social media accounts. Not only is it the capital of Switzerland, it's also a UNESCO World Heritage Site. Bern's historic landscape dates back to 1191 and is characterised by the Clock Tower (Zytglogge), the Prison Tower (Kafigturm), the sculptural fountains from the Renaissance, the Cathedral (Mnster), and the impeccable sandstone facades.