The map (which puts you within a quarter mile of the Falcon, but doesn't show it) is at:

http://www.multimap.com/map/browse.cgi?client=public&X=301500&Y=200500&width=500&height=300&gride=&gridn=&srec=0&coordsys=gb&db=&addr1=&addr2=&addr3=&pc=&advanced=&local=&localinfosel=&kw=&inmap=&table=&ovtype=&zm=0&scale=10000&multimap.x=203&multimap.y=178

The pub's website is at:

http://www.thefalconinn.net

but has no postcode (which is helpful!)

Aberdare, and more specifically, Cwmaman is in the Cynon Valley about 20 miles northwest of Cardiff.

I'll try and find the postcode to access a specific map.

Hope this helps so far.