Steam engines from far and wide are arriving for the annual Great Dorset Steam Fair which starts today.
After last year's mud bath, which saw dozens of cars towed free, a network of roads has been built on the site to stop bad weather disrupting the event.
One engine has travelled miles under its own steam to get to the venue.
Steam enthusiast Rob Wing let us in on what makes it fun.
A network of roads is to be built on the site of the Great Dorset Steam Fair to stop bad weather disrupting the event.
Last year, tractors were brought in to tow vehicles and there were long queues for the site at Tarrant Hinton near Blandford Forum. Some displays had to be cancelled. Organisers are planning to change the layout and are applying for permission for more than three miles of permanent roads.
Organisers at the Great Dorset Steam Fair will today attempt to beat the world record for the greatest number of steam rollers in a parade formation over a set course. Around 110 steam rollers will participate, travelling on a brand new road created in the road-making section at the event.
The current record is also held by the Great Dorset Steam Fair; a total of 32 vintage steam rollers passed over a length of new road on 31 August 2003, exactly 10 years ago.
The Great Dorset Steam Fair gets underway this morning. Last year's event was disrupted by heavy rain with some displays cancelled but the forecast is good for today.
Up to 200,000 people are expected over the next five days at the event at Tarrant Hinton near Blandford Forum.
It's one of the largest steam fairs in Europe with hundreds of vintage vehicles, including more than 250 tractors.
Organisers of the Great Dorset Steam Fair that starts on Wednesday have urged visitors to prepare for warm weather.
There are already 5,000 caravans and tents on the site with an expected 15,000 more to be set up over the next few days.
Visitors have been advised to take sun cream, sun hats and plenty of water.
The event runs from Wednesday to Sunday at Tarrant Hinton in Blandford Forum.