We took the tunnel tour with a group of 20. Hans is a highly knowledgable guide who adapts his tours to match the interests of his guests. He talked about Frank Sinatra's legacy running the resort. He talked about Frank's affiliations with the mafia, Marilyn Monroe, the Kennedy's and more. The tour includes back passages and secret passages beneath the resort. There are several stairways that may be challenging. If you love rat pack history and intrigue you will find it worth it. Do your fellow travelers a favor and leave the kids in the arcade.