The Unfinished Obelisk is the largest known ancient obelisk. It is located in the northern region of stone quarries in Aswan. Hatshepsut erected the obelisk to complement the lantern obelisk in Karnak Temple. If the obelisk had been finished, it would have been about 42 metres tall and weighed nearly 1,090 tons. After carving the obelisk out of the bedrock, some cracks appeared in the granite, and the project was abandoned. The bottom side of the obelisk is still attached to the bedrock. The unfinished obelisk reveals much information about the stonework's techniques and the tools used by the ancient Egyptian workers.