The Legoland park in Windsor has been evacuated after a fire broke out in a shed being used to store chemicals.
Visitors Helen Sheppard and Amanda Westwood took this picture
About 30 firefighters were called to tackle the blaze at the Berkshire attraction and 2,000 people had to leave the park.
A fire service spokesman said 800 litres of chlorine and 800 litres of hydrochloric acid went up in flames.
Nobody was hurt but the Environment Agency was called in amid fears the site had become contaminated.
The site where the fire was located was out of public access but the smoke posed a risk to visitors, the spokesman said.
Investigations are under way to find out how the fire started.