The Leaning Tower of Pisa was declared a UNESCO World Heritage Site back in 1987, serious efforts to stabilize the monument were taken. The tower was originally constructed over a period of 199 years (1173-1372) and since then was tilting 1mm for every year. The project of restoring the Pisa Tower has been ongoing for the past 20 years, and now it is open to the public scaffolding-free.
The project cost around €27m and has lessened the tilt by 50cm, making it straighter, yet still with its famous lean. It now stands at 56meters tall at its highest point.