for all round fantastic futuristic architecture, you can't beat Lancaster (Forton) services (more here). shouldn't all buildings look like this by now ?

these photos were taken out of the window as we drove by

it gives the impression they cook using nuclear power

My all-time favourite service station, for all round loveliness is the Killington Lake one (southbound only, up by the lakes somewhere). It's got its own little lake and would make a nice destination in itself. i only took a picture of the sign this time though.