Pinkpop
Pinkpop is an annual music festival held in Landgraaf, Netherlands. It is currently the longest-running continuous annual pop music festival in the world. It is usually held on the Pentecost weekend. If Pentecost falls on an early date in May, the festival is held later in June. The festival began in 1970 and has been held at Megaland, a 27-hectare site, since 1988.
Read more on Wikipedia