The club's all-time top goalscorer was taken around the world-famous, two-and-a-half-mile circuit by 2013 Indy 500 champion Tony Kanaan.
Liverpool v Borussia Dortmund – July 19, Notre Dame Stadium | Click here to buy tickets
“It’s a bit nerve-racking going around the [turns] and he was actually showing me where there’s been a few crashes,” Rush said.
“I don’t think that helped. But it was a great experience and something I’ll never forget.”
Rush toured the museum of the track and its pagoda, where he saw 'You’ll Never Walk Alone' lit up on the scoring pylon.
After getting the chance to kiss the Yard of Bricks, he then exchanged gifts with Kanaan, handing the Brazilian a Liverpool shirt before receiving a customised Reds racing helmet.
The Welshman added: “We all know about the Indy 500, and to actually come to the track and see how massive it is and everything [is amazing].
"When people tell me there’s 300,000 people to watch it, it’s surreal really. But when you get here and you see how big it is … it’s exciting here.”