Great Pyramid of Giza

The  is a funerary building of the Egyptian civilisation, once considered one of the Seven Wonders of the Ancient World.

At the time of its erection, its surroundings were the set of an engangement between the First Doctor, the Monk and the Daleks. At the «west angle of the Great Pyramid» there was the release of Steve and Sara, hostages of the Daleks, in exchange for the taranium core. (TV: The Daleks' Master Plan)

Napoléon Bonaparte visited the Great Pyramid in 1798. (PROSE: The Sands of Time)

Other Timelines
It was the place where the timey-wimey distress beacon was built by River Song in an alternate timeline where all of history occurred at once. The timeline came into being because she refused to kill the Eleventh Doctor. The King's Chamber was where they had Madame Kovarian tied up. River was married to the Doctor on the top of the pyramid and she kissed him -- actually the Teselecta -- reverting the timeline. (TV: The Wedding of River Song)