This page shows you the location of the FIFA ticket centres / collection points in each of the 12 venues.  The links show you satellite photos / maps from Google maps, enabling you to picture exactly where these ticket centres are.

Opening hours
The centres are open from 11am to 7pm.  On match days they are open at the relevant venue until the end of the game

Berlin: Berlin ticket centre on Google maps
Rudolf Harbig Halle,
1 Glockenturmstrasse / Passenheimer Strasse

The ticket centre is at the junction of those two streets, just to the back of the Olympic Stadium and near the Waldbühne.  Must be the rectangular hall-style builing on the junction.

Cologne: Cologne ticket centre on Google maps
Am Radstadion,
Peter Günther Weg / Aachener Strasse

Next to the white stadium in the top left-hand corner of the picture (it's a velodrome).  Note this satellite photo is a bit old - the football stadium lower down the picture has changed a lot since it was taken ... it's now rectangular with NO running track!

Dortmund: Dortmund ticket centre on Google maps
Westfalenhallen,
45 Strobelallee

Just above the stadium on the map.  Part of the exhibition hall complex over the road from the ground.

Frankfurt: Frankfurt ticket centre on Google maps
Am Stadionbad,
Mörfelder Landstrasse

Next to the swimming baths along that main road to the right of the picture. 
Note: this photo is also several years old, as it shows the Waldstadion in its old form.  The physical location of the stadium and the baths have not changed though.

Gelsenkirchen: Gelsenkirchen ticket centre on Google maps
Emscher Lippe Halle,
118 Adenauerallee

At point C on the map. Just to the south-east of the stadium (note the ground is shown in the satellite photo with the roof closed.  The open ground above it is Schalke 04's old ground, the Park Stadion).

Hamburg: Hamburg ticket centre on Google maps
2 Sylvesterallee

At point G on the map, i.e. it looks like its in the concert arena directly opposite the stadium.

Hanover: Hanover ticket centre on Google maps
8 Ferdinand Wilhelm Fricke Weg

Not sure exactly where on Ferdinand Wilhelm Fricke Weg - but you can see the road just to the south of the stadium.

Kaiserslautern: Kaiserslautern ticket centre on Google maps
10 Kohlenhofstrasse

Just down the hill from the stadium ... looks like the Kaiserslautern club shop to me.

Leipzig: Leipzig ticket centre on Google maps
Bei der Festweise
Am Sportforum / Ecke Jahnallee

Note: This satellite photo is pretty old!  It shows the old concrete bowl of a stadium from the DDR days.  The new stadium has been dropped into that old bowl.  To the bottom right of the stadium you will see what looks like an area of light-coloured waste ground.  That is now the site of the Sportforum indoor sportshall / concert arena.  That (on the corner of Jahnallee) is where the ticket centre is.

Munich: Munich ticket centre on Google maps
Am Kunstpark Nord
Werner Heisenberg Allee

Not exactly sure where, but you can see Werner Heisenberg Allee running around the right of the stadium (note: picture must be about 2 years old, as the stadium is clearly in the middle of being built).

Nuremberg: Nuremberg ticket centre on Google maps
Am Zeppelinfeld,
Hermann Böhm Strasse

Go up to 11 o'clock from the stadium (across the Zeppelinfeld, i.e. the former rally grounds) and the collection point will on the road on the far side (if you switch to 'map' view its on Hermann-Böhm-Strasse.

Stuttgart: Stuttgart ticket centre on Google maps
Hanns Martin Schleyer Halle
69 Mercedesstrasse

At point C on the map, just up the road from the ground.