This building is the tallest building on Royal Mile Avenue. Upon the roof, you can enjoy the charming scenery of Edinburgh free of charge with telescopes. You can see Fox Bay and Fox Bridge. There are various interesting exhibitions about optics in the small building. The most peculiar one is a 19th century device on the top floor of the small building, which uses lenses and mirrors to project city images onto a huge horizontal screen. Through this device, you can see the crowds walking in Edinburgh Castle Square not far away and the busy shops on Prince Street.
Many photographic art exhibits are of great value to visit.