I'd say that
Laterna Magika is worth a visit. The building itself is very interesting - the concept is that you are
inside the magic lantern whilst the performance unfolds. Google around for more info as my link doesn't give the best impression. Some of the repertoires are better than others and I'd suggest giving "Matador" a miss but these things are very subjective so please don't take my word as gospel

There's some Bauhaus furniture in there which you are welcome to loaf around on and might like to photograph. Entry to the building is free of charge although I don't know what the opening times are.
Another interesting edifice to photograph is the
"Fred and Ginger" building. Just by the by and a long story for another time, on my first visit to Prague I was told by my driver to look out for "the gingerbread building" which I took to be a Hansel and Gretel style place. It wasn't!
Good food, beer and photo ops to be found at
U Kalicha (the goose they serve here is particularly good) and
U Fleků
The
Astrological Clock and The Church of Our Lady Before Tyn are both very photogenic, as are most things situated in the vicinity of the Old Town Square (I think Kafka's house and the street upon which it is situated make very interesting subject matter:
"Inside the Hradcany complex, tiny 16th century working class homes hug narrow cobbled roads. During the winter of 1916, Franz Kafka wrote many of his stories while living with his sister on 22 Zlata ulicka").
If you're not ashamed to be moved to tears in public, see if you can get a look around the crypt of
Saints Cyril and Methodius Cathedral. I've asked and always been allowed to take photographs. Being in the crypt where the resistance parachutists underwent their ordeal and subsequently met their demise then going outside and seeing the bullet holes.....too moving for words
The best panorama of the city (IMHO) is from
Cowboys - a good lunch venue. Ignore the chavvy name. The food is great, interior of the historic building also great and the view from the upper terrace....wow! It's on the way up the hill to the Castle and en route you get to take in not only the Cathedral of St Vitus (fabulous light coming in through the stained glass windows and free entry) but some good doorways too; that of the Italian Consulate is my favourite.
Hope this is useful, sorry for going on and posting so many links but wishing your travels to Prague every bit as enjoyable as my own (and looking forward to the photos!)
My invites and free of charge visits to The Czech Republic are courtesy of the Swedish Ambassador to Mongolia who lives in Prague - go figure that!
