Dating from the Viking Age, Roskilde is an important stop between Copenhagen and the western regions of Denmark. The city prides itself in having one of the most impressive cathedrals in Denmark, Roskilde Cathedral, which is a UNESCO World Heritage Site. Built in the 12th and 13th centuries, the Roskilde Gothic Cathedral was the only cathedral in Zealand until the 20th century, attesting to the city's early importance. With its picturesque location by the fjord and its rich historical heritage, Roskilde is a perfect day trip from Copenhagen, which is only 30 minutes away.