Ripley's Believe It or Not, it's located inside Royal Garden Plaza on the beach road. I think it is on the 3rd floor. If you can find your way to Royal Garden Plaza, then you will find Ripley's. Here there are more than 300 of extraordinary items from all over the world that is sure to leave you amazed.
You may also want to try ; this is a high-tech movie system that will make your senses believe you are in the movie with all sound affects and specially created movie.
Recently they've just started Ripley's haunted adventure. This is not just a normal haunted house, my personally advice is that this is not a place for soft hearted ladies and kids. Must go with your girlfriend.
Infinity MazeScream in the Dark, it's setting in a black theme with abyss of crazy clowns, ghastly grave robbers, living dead, devilish dogs, attacking skeletons, mystical mirrows, etc.
Louis Tussaud's Waxworks, it's an international wax museum from the USA has established the fifth branch in the world and the first in Thailand.