In case you didn't know, outside of making music and being with his family, one of Sir Rod Stewart's greatest passions is model railway sets.
And now, after over two and a half decades, 26 years to be exact, Rod has unveiled his true labour of love to the world - a humongous and extremely detailed railway model of a US city.
The incredible 124ft long x 23ft wide model is set in the 1940s, and contains hundreds of buildings including trackside shanties, large factories and skyscrapers.
Called 'Grand Street And Three Rivers City', it also has a railway station and several bridges. There are also period cars and lorries, and a gorgeous landscape.
Sir Rod told Railway Modeller magazine that scenery and structure modelling, rather than trains or tracks, are his personal favourite part of the building process.
"It's the landscape I like. Attention to detail, extreme detail, is paramount. There shouldn't be any unsightly gaps or pavements that are too clean," he said.
He was inspired by American railways as he was living in the States when he began the model in 1993. At the time, he had just built a new house in Los Angeles, which included an attic room specifically for the build.
"When I take on something creative like this, I have to give it 110%," he added. "For me it's addictive. I started, so I just had to finish. I'm lucky I had the room. If I'd have realised at the start it would have taken so long, I'd have probably said, 'No! No! Nah!'"