The public were allowed into Britain's Olympic Park at Easter for the first time since the 2012 Games, with a behind-the-scenes tour of its transformation into a new neighbourhood of London.
More than 23,000 tickets have already been sold for the hour-long accompanied tours of Olympic Park, organisers said, which offer a sneak preview before the Stratford site begins to open in July.
Visitors don hard hats and high-visibility jackets to tour what is still a construction site, where sporting venues are being transformed into a new district of homes, schools and businesses.
The Park in Progress bus trips, offered on weekends and school holidays until 23 June, will also include a visit up the red ArcelorMittal Orbit tower designed by Anish Kapoor.
"We promised to give people opportunities to get back onto the park as soon as possible and it is no surprise that there is a huge appetite from Londoners for these fantastic tours offering a chance to see this exciting metamorphosis first hand,'' London Mayor Boris Johnson said.