Travelers planning a city trip often end up in metropolises like London, Barcelona, Vienna or Paris. But there are many more European cities that can be reached within a few hours by train or plane and are just waiting to be visited. In times of overtourism, underrated cities offer welcome tranquillity and often a more relaxed ambience. Instead of queuing in front of the Louvre or waiting in line at the Vatican, the alternative destinations are just as enticing with many sights and offer surprising insights. We've ploughed through the map of Europe, travel books, and our own travel experiences - and present what we consider to be the 10 most underrated cities to visit across Europe.