Revellers relaxing inside a 3-D Luminarium inflatable installation by British designer Alan Parkinson during the Sziget Festival on an island in the Danube River in Budapest, Hungary, on Sunday.
Sziget, which means island in Hungarian, takes its name from its location, a 108ha island on the Danube north of downtown Budapest.
Since its start in 1993, it has increasingly gained international fame, growing from a relatively low-profile event to one of the most prominent European rock festivals.
In the past, Sziget has featured acts as diverse as the late singer Prince, electronic duo The Chemical Brothers and heavy-metal band Iron Maiden. The festival also has a "Cirque du Sziget", with live circus acts throughout the day, as well as a theatre and dance tent which offers yoga lessons.
This year's edition started last Wednesday and is on till tomorrow.
Last year, the festival attracted about 441,000 visitors from 95 countries.