Visit Trondheim by train, a centuries-old city that is today the third largest city in Norway. This fjord-side municipality is filled to the brim with intriguing landmarks and sites seeping in Norwegian history. See the statue of Olav Tryggvason, the man who founded Troundheim, set atop an incredible obelisk and standing guard of the fjord. Tour Stiftsgården, the city's massive, 100-room royal residence to peer inside the life of Norway's royalty. Perhaps one of the most incredible sites is the Niadros Cathedral, a stunning Gothic church constructed in 1070. With museums, landmarks, landscapes and more, you won't want to miss a thing!