Cologne is an ancient German city teeming with cultural heritage. Make customized chocolates at the Cologne Chocolate Museum displaying antique chocolate boxes, wrappers, and collections casts. Trace the history of chocolate from Mexico to Europe at this unique museum that gives a glimpse of the chocolate-making process. Marvel at the architectural brilliance of Cologne Cathedral, the single most visited landmark in Germany reputed for its 19th-century towers and valuable art. Take in the beautiful view of the skyline of Cologne at Hohenzollern bridge across the Rhine River. Visit Ludwig Museum to see an extensive collection of modern art and avant-garde pieces by expressionist and classical artists.