Sonic Wonderland is a popular science book about the most remarkable sounds in the world. In this talk, Trevor will look at some of the detailed acoustic science behind a few of the wonders, picking examples that required first hand research by himself. It will begin by solving the mystery of Echo Bridge, something that first appeared in the Journal of Acoustical Society of America in the 1940s. Trevor will present measurements that he made at the badly tuned musical road in California. To finish, he will look at the detailed acoustic properties of the world's 'longest echo', and explain why the record isn't for the longest reverberation time.