The world heritage site Sagrada Familia located in Barcelona, Spain is a Roman Catholic church designed by Catalan architect Antoni Gaudi (1852–1926). Although the construction has started in 1882, it is still ongoing after 130 years. This construction is said to be completed in 2026 and we can observe the progress of it on this aerial video.
It looks like as it is already close to completion when you actually see it at the site but there are more parts to be build upon what we see now.
It is hard to imagine how it would look like at completion in 2026 but it is something we all want to look forward to.