The former Roman colony prides itself in the abundance of monuments preserved here - from the amphitheatre to the bridge which is still used.
Wikipedia http://en.wikipedia.org/wiki/Trier#Main_sights
Official website http://whc.unesco.org/en/list/367
Address 34 Metzelstraße, Trier 54290, Germany
Coordinates 49°45'21.146" N 6°38'14.233" E