Paul McCartney's Car Nearly Impounded

Sir Paul McCartney's car was nearly impounded on Saturday.

The Beatles legend -- who is currently on a road trip with girlfriend Nancy Shevell in the US -- parked illegally at Joliet Area Historical Museum, Illinois.

Tony Contos, a worker at the museum, said, "They parked in the wrong bay and were nearly towed away. Paul was engrossed, Nancy seemed in a bit of a hurry."

Paul, 66, and Nancy, 47, are currently traveling across America's famed Route 66 in a classic 1989 Ford Bronco.

However they shocked staff at the museum when they stopped en route from Nancy's home in the Hamptons, New York.

Museum worker Pamela Blesen said, "I froze. It was like seeing Bigfoot."

And an onlooker added: "They seemed totally in love."

The pair -- who started dating last year -- are believed to have told only a few friends about the trip, and Paul's four-year-old daughter Beatrice is expected to join them later.