It might get overshadowed somewhat by the nearby Aarhus Cathedral, but ignore the Church of Our Lady at your peril. This Church of Denmark charmer has plenty going for it, with the highlight waiting deep underground. The crypt church is the oldest in Denmark and one of the most intriguing, a stone-centric stunner dating all the way back to 1060. The crypt church is still used once a week, believe it or not. The rest of the church is somewhat shrouded in secrecy, which makes it all the more interesting.