Cheomseongdae Astronomical Observation Tower, Royal Tombs burial mounds, UNESCO World Heritage Site, Gyeongju, Gyeongsangbuk-do, South Korea, Asia

Jahrtausendturm, Millennium Tower, Magdeburg, Saxony-Anhalt, Germany, Europe

Observatory Hornisgrindeturm, by night with Milky Way, Seebach, Baden-Württemberg, Germany, Europe