Hi Erik,
glad to hear you enjoyed your visits here!
There are two Bermuda Triangles where modellers usually disappear in Prague centre: the first one is marked by MPM shop in Myslikova, modelbazar in Pstrossova, Bilek shop in Opatovicka, Pecka shop in Karoliny Svetle, railway hobby shop in Bartolomejska and Krakatit (Netopejr) book store in Jungmannova streets. The second and smaller is marked by Pecka in Zlatnicka, Corona book store in Hybernska, and MAC shop in Benediktska streets.
There are three shops near the end of Metro C line: Legato in Mendelova, Blue Max hobby shop and book store in U krčské vodárny, and MPM in Budejovicka streets.
Very interesting Artur model shop is in the Na Belidle street on the line B. New railway hobby shop Atelier Modely.biz is in Slanska street. You can reach it by tram from the Andel Metro B station.
Two nice hobbyshops - one of railways models, second for car models are in the Cerna Ruze passage from Prikopy to Panska streets.
Addresses of many of shops mentioned sometimes with maps you can find here:
http://www.smallscaleafv.com/ANG/Ibr/11_IBR_CZ.htm
http://bluemax.cz/kontakt.php
http://www.artur-m-c.cz/inshop/Pages/Prodejna_Praha.htm
http://legatokits.cz/shop.html
http://www.mac.distribution.cz/html/shop_center_in_prague.htm
http://www.modely.biz/Zobraz.php?staticke=1001&typ=11
http://www.modelyjk.cz/index.php?nid=1619&lid=CZ&oid=169837
Of interest is the Army Museum in the U Pamatniku street.
http://www.vhu.cz/cs/stranka/armadni-muzeum/
And Museum of Aeronautic in Kbely.
http://www.vhu.cz/cs/stranka/letecke-muzeum/
Museum of Czech Railways in Luzna west of Prague has three BR-52s on display.
http://www.os.cd.cz/muzeum/
Museum of agriculture machines in Caslav east of Prague has some nice wartime tractors.
http://www.nzm.cz/caslav.php
Regards
Tomas