Back in the dim past of personal computers, flight sims were the rage. They were the kind of game that didn't just emulate something simple like Tic-Tac-Toe or a Monopoly board. The computer could do the calculations to give you a rough feeling of flight. The original sims were wire-frame applications, but as computers gained in power, the simulations got more and more realistic.
Flight Unlimited Las Vegas is a very slick flight sim at a reasonable on-sale price of US$2.99. The game lets you complete missions for the Las Vegas mob, or just fly around, look at everything and land again.
The views out the windows are detailed and impressive. The app renders 130 square miles of the city, and you can fly down the Strip and look at the hotels and other sites. When you are close to the ground, don't be surprised to see trucks, cars and buses on the roads.