eh, most of those seem like crap, I'd just say screw the lighthouse (unless you want Atlantis ASAP). I never use caravans so Pisa is weak, Scotland Yard is good, but in multiplayer only (I don't think the AI has ever used Spais, unless they got them from me...) and is it all GPs, or only the ones in the city you build the Yard in? SETI is useful if your neck and neck in a space race and have extra hammers... Camelot is good if you get it at a certain point... and Babel is pointless, since you can just ask most Civs to introduce you to undiscovered Civs if you're really that interested...