Legoland is to close this weekend following threats from far right groups over a private fun day organised by the Muslim Research and Development Foundation.
The theme park in Windsor, was due to hold the event this weekend, but it was cancelled following advice from the police.
The threats included phone calls, emails and messages on the theme park’s Facebook page which has been shut down.
In a statement, Legoland said: "Sadly, a private event due to take place on Sunday has had to be cancelled due to threats from right-wing groups made against the resort. The whole resort, including the hotel, will be closed for the weekend.
"We are extremely sorry that we've had to cancel any hotel visits for guests booked in to stay over this weekend.
"We wholeheartedly understand families' disappointment that they will be unable to attend and appreciate that due to the dynamic nature of this situation we haven't been able to give them more notification."
Thames Valley Police has said it is investigating.