United Kingdom, April 23 -- Sir Rod Stewart's model railway will become a "museum piece" and live on after he dies, his wife Lady Penny Lancaster-Stewart has predicted.

The 80-year-old music legend has spent decades creating the 1,500sq ft train set and when he tours he has parts of it shipped around the globe so he can work on it during his free time.

Penny, 54, says the model railway - which is a World War II Manhattan replica called 'Grant Street And Three Rivers City' - is such an amazing and unique set that it deserves to be enjoyed by others after Rod's death.

During a discussion about the possessions of lost loved ones on UK daytime TV show 'Loose Women', she said: "Rod will live on.

"His railway that he's worked on for 30 year...