The Yen Tower is a skyscraper in Jena located near Building 15 - the first high-rise building in Germany. The construction of the Yin Tower began in 1969 until 1972, and its length was about 127 meters, and it is considered one of the tallest towers in the East German region. Two floors and an antenna tower were added to the building, bringing it to a height of about 149 meters, and tourists can see the city from above from inside the tower.