这是一个十分复杂的复杂句,从句里面套从句.
I主语,knew谓语,that后面接的是宾语从句
that后面接的是宾语从句中called Lavallette是后置定语,修饰resort
a place是同位语,I did not visit again until I was seventeen是a place的后置定语
there to have the only authentic attack of homesickness I have ever had也是a place的后置定语
（a place to的搭配）
there是一个方位副词（可以省略不看的）
I have ever had和brought on by the sound of the pounding surf又是homesickness的后置定语.
还有什么问题可以追问.
欢迎交流!