The Luxor in Las Vegas is to the actual CITY of Luxor, Egypt, as marshmallow fluff is to fois gras. (We’re sure you knew that. We just enjoy analogies.) Sure, the hotel/casino in Vegas might have a beam of light visible from space, but we bet you'll find a hot-air balloon ride over the Valley of Kings much more illuminating. (Editor's note: Our list was compiled before political unrest prompted many countries to issue travel warnings for Egypt. If you're currently planning a trip to Egypt, please consider the risks and monitor your government's travel alerts.)