4. Penn and Teller
Despite the numerous magicians on the Vegas Strip, Penn and Teller are a must-see when visiting Las Vegas. Penn is the taller and more talkative one of the two, while Teller plays the straight man. The duo began their shows at the Minnesota Renaissance Fair in 1975, and by 1985, they were entertaining guests off-Broadway and earned an Emmy Award for their PBS show Penn and Teller Go Public. Since 2001, they have been residency entertainers at the Rio.