Originally Posted by Dr.Sartorius
Just remembered a couple more things.
There's also Henry Sr.'s house from "Crusade". Good ol' Ravenhead, Jeremiah Jones
, found it and gave the precise location in post #17 of this thread: Filming Locations
Not sure if you're into Young Indy but Remy & Indy walk down some steps with Big Ben in the background. These steps are on the northwest side of Westminster Bridge and lead down to the Thames embankment.
You can also see the wax figure of Indy at Madame Tussaud's. Great likeness but he's being chased by a gigantic, disco mirror-ball!
The Imperial War Museum is also highly recommended. (While I'm a 'friend' of the National Army Museum, it is much smaller and doesn't have much WW2 stuff in it so you'd probably enjoy the much larger, Imperial. If you are interested in the National, it's right next to the Chelsea Barracks.)
I've been to London 4 times and LOVE it. Have a great trip, Dr. Sartorius!
P.S. Shouldn't this be in the Globe-trotting section?