The Vespucci Initiative will hold two one-week institutes again this summer. The first week (July 7 to 11) on VGI and Citizen Science will be held in Fiesole, just outside of Florence, Italy. The second week on Brain and Space (September 1 to 5) will be held in Lisbon, Portugal.
I have attended a Vespucci Institute before and I can wholeheartedly recommend going. The application deadline for the first week has just been extended until May 15, and there are some travel grants available.