observation tower - Robuta Search

https://www.lonelyplanet.com/points-of-interest/prospect-point-observation-tower/1123829

Part of the Maid of the Mist complex, this viewpoint juts out into Niagara River, giving a vista onto the American Falls.

https://www.tugraz.at/en/fakultaeten/architektur/news/faculty-news/article/wartenstein-observation-tower0

This is the page 'Faculty News' of the website 'Faculty of Architecture'.

https://www.fws.gov/media/wildlife-observation-tower

https://www.japan.travel/en/spot/532/

When you arrive at Hateruma Island, you've come as far south as you can in Okinawa and Japan.