Scores of people attended an illegal rave at a disused industrial building in Cambridgeshire.
Police officers spotted the party at Colmworth Business Park in Eaton Socon, St Neots while on patrol at about 23:20 GMT on Saturday.
Cambridgeshire Police said 200 people had left by about 19:30 on Sunday after a dispersal order was put in place and a clear up operation was under way.
One woman said music could be heard "from miles away" and kept her awake.
Police said more than 35 officers attended.
Two people have been arrested, one man on suspicion of drug driving and the other on suspicion of failing to comply with the dispersal order.
A resident of Eynesbury, more than a mile away, who wanted to remain anonymous, said: "I first heard the noise at about 23:15 and I thought it was my neighbours having a party, but by 01:00 I realised it wasn't them.
"It kept waking me up and at about 06:00 I looked on social media and found out it was a rave."
"It is so rude of the ravers, they are breaking the law, it really is a step too far," she added.
Another comment on social media said: "Been up all night, not the happiest of households."
Not everyone was as annoyed, as another said: "Let them have fun, I am sure there is more pressing matters you [police] should be attending to."