Take a look at Narnia.com, they’ve added a tour of Narnia, in which you’ll eventually be able to explore all of Narnia. There are currently two places available to visit!
You can visit the Lamppost, which will bring up a little bit of Lucy and Mr. Tunmus, running towards it.
You can also take a look at the home of Mr. Tumnus, which includes the music that Tumnus plays to Lucy, I believe, which is the first bit of score that Harry Gregson-Williams composed for Narnia!
Thanks to Julian!