You can see many of Copenhagen's sights from the top of this old tower, which dates back to the 17th century AD, which has been preserved and restored in order to preserve the city's heritage. This circular tower was built as an astronomy observatory in 1642 AD, under King Christian IV. Today, it is considered a magnet for tourists, and the site of many activities, events and celebrations. Knowing that there is no elevator or stairs in this place, and when you want to climb to the top of this tower, you must climb the internal slopes to enjoy the panoramic view that overlooks it.