The Unfinished Obelisk in Aswan, Egypt is the largest known ancient obelisk, left abandoned due to cracks in the granite during its creation. If completed, it would have been over 41 meters tall and weighed around 1,090 tonnes. The site offers a unique glimpse into ancient Egyptian stone-working techniques, with visible tool marks and ochre-colored lines where workers were carving. It's like a giant unfinished puzzle waiting to be solved!