Stonehenge

Stonehenge was an assemblage of giant stones erected in Wiltshire during the 2nd Millennium BC.

Creation
The Doctor and Samantha Jones visited Stonehenge while it was being constructed. (ST: The People's Temple) The Monk, however, claimed to have used anti-gravity lifts to assist in the completion of Stonehenge circa 1500 BC. (DW: The Time Meddler)

At some point in its history, the Alliance placed the Pandorica beneath Stonehenge for the Doctor to find. The pillars beneath Stonehenge began to act as a transmitter for the members of the Alliance to converge on it in 102 AD. The transmission was sent to everyone and to all time zones, resulting in Vincent van Gogh (presumably amongst others) having visions of the opening of the Pandorica. As the pillars within the "Under-Henge" were clearly more than their appearance would suggest, and as as the Pandorica was also placed there, it is possible (if not likely) that the Alliance constructed the "Under-Henge". When the Doctor arrived at Stonehenge and found the Pandorica, the Alliance imprisoned him within it. (DW: The Pandorica Opens) Since the Doctor later re-wrote history and the Alliance was never formed, it is probable that the "Under-Henge" and its contents no longer exist. (DW: The Big Bang)

The Druids
During the times of the druids, the Cybermen were believed to have been guarding the Pandorica underneath Stonehenge. Parts of Cybermen such as arms and heads lay on the ground around the henge. The Doctor believed they had been 'dusted up by the locals'.(DW: The Pandorica Opens) Since the Doctor altered the timeline, the presence of the Pandorica and, subsequently, the Cybermen had never occured. (DW: The Big Bang)

Modern times
During the 1970s, the Ragman was defeated at Stonehenge. (PDA: Rags)

In 1976, UNIT fought Vardans at Stonehenge, where the Doctor was captured by the Monk. (NA: No Future)

Circa 2005, when Canisian General Tannis invaded Earth, he had his fleet land near Stonehenge. (WC: Death Comes to Time)

Stonehenge was among the Earth cultural items the Threshold had stolen and taken to the town of Wormwood on the Moon. (DWM: Wormwood)

Other information

 * Stonehenge was near the location of an opening to the Yssgaroth's Universe. (NA: The Pit)

Behind the scenes

 * For  The Pandorica Opens, the Doctor Who team went to Stonehenge to get the scenes in and around the landmark. (CON: Alien Abduction)