Showing 2 / 2 attractionsNo.1MuseumKARL-MARX-HAUS MUSEUMThe Karl-Marx-Haus in Trier, Germany, is the birthplace of K...🕐 2-3 hours★ 3.8No.2SightseeingPorta NigraThe Porta Nigra, referred to by locals as the Porta, is a la...🕐 1-3 hours★ 3.5