Amsterdam

I am just about to visit Amsterdam on a business trip. The last time
I went to Amsterdam was when I was 7 (I think). I remember really
enjoying it then, granted I was 7 and I loved trams, but I am really
looking forward to visiting it again.

What would people recommend to do if I have any free time over the
next two days?

I plan in taking a couple of photos so I can at least try and document
some of this trip.