We’ve all seen those crock climbing walls at amusement parks, malls and fitness centers. Climbing your way to the top is definitely challenging, but that feeling you get when you reach the top is great. Still, I bet it doesn’t compare to the feeling one gets after climbing Excalibur. You see, Excalibur is not just a regular rock climbing wall. Located in in in the Netherlands, the wall is the tallest in the world, standing a towering 121 feet high. If you ever get there and decide you want to give it a try, I have one advice for you: don’t look down!