"... I'm aware of megalithic.co.uk but was just blown away by quite how clear & easy to use this site was for finding places of interest to visit."
"Although hard to use after the simplicity of TMA!"
Did someone pay you to be so kind? :-)
Quite some time ago I was going to set up a website for later periods which would have been fairly similar in structure to TMA, but found I just didn't have the time (still haven't). A fair amount of people seemed to want it, but few were willing to moderate it (actually no one offered when I asked for volunteers!) I got most of it written, but shelved it. Shame really.