Lottery Tower
Soliano al Rubicone Tower
Forest Tower, Schovenhorst Estate, Netherlands
Viewing Tower, Reusel, the Netherlands
Observation Tower, Offenbach
Pegelterm in Germany
Grand Canyon Skywalk
Aurland Lookout, Aurland
Korkeasaari Lookout Tower
Smber : http://www.mamasipenk.co.cc/2010/11/tower-keren-di-dunia.html