Here are 5 great summer destinations in Europe, including Copenhagen, the capital of Denmark. It was ranked #1 on the Best European Family Vacations list by US News. Regarded as a cultural city, it is home to some of the best contemporary art museums. This destination is a sightseers dream with stunning architecture all around. Another recommended destination is Avignon, France, where you can see The Pope's palace and enjoy the contemporary arts festival in July.