Hi Ian,
Thanks for your reply, actually your site loads very quickly for me here in Barcelona, almost instantaneously. I have a home fiber-optic line so a fast connection . . . . but probably not as fast as the phone company marketing claims, of course!
So, your site is unique for sure, loads of mouse-over affects and pop-up layers, so it's pretty complicated behind the scenes -- simple looking but effective with lots of useful info popping up.

I'm guessing/hoping as Gary above that they don't all load from the server until called-up; I want to use some moderately hi-res photos in the pop-ups but I better know for sure what's happening, especially for visitors on mobile networks.
Thanks again and let's see what the experts say!

Cheers, Kevin