Organisers say 15,000 people went along to the Mallard festival in Grantham over the weekend.
The town was a hive of activity on Saturday and Sunday as visitors poured in to see the famous train, the world record holder for fastest steam locomotive.
Vintage buses bringing people to the railway station, where the 167-tonne Mallard has stood on specially laid tracks since its arrival on Wednesday, were packed full of families eager to see the famous blue train.
They were met with lengthy queues full of train enthusiasts who had travelled into town and also local families not wanting to miss out on the opportunity to get up close to such a legendary engine.
Visitors could also see a diesel Deltic, take tea in a buffet carriage, hop on a mini locomotive and learn more about the history of the railway in an exhibition marquee.
More photos and video footage to follow.