An Unexpected Journey

I had planned to spend the day at the Amberly Museum and Heritage Centre but, when I arrived there, I found that it is only open Wednesday to Sunday. I'm sure it never said that on the website. Oh well, not to worry. I went back two stations and had a lovely few hours in Arundel instead. Second hand book shops, antique shops, forest and lakeside walks and cream tea on top; perfect. Probably I'll go to Amberly tomorrow instead.

This riddle is relevant.