Here are a few videos of the Delta Flume in action. The Delta Flume is the world's largest man-made wave generator and simulator capable of producing tsunami-like waves in a closed environment.
If you would like to visit, the Delta Flume is located at the Deltares Research Institute in the Netherlands.
The video below isn't of the Delta Flume, but it is another flume on a much smaller scale. Same purpose however -- to study the way waves move in the ocean.