About 3km from Salisbury station is the Old Sarum. After visiting StoneHenge the return bus ride stops at Old Sarum. Its a ruined fort much in the lines of Dholavira but located in a even bigger area of land.
The specialty of Old Sarum is that it has always been an important spot ever since pre-historic times. About 5000 years ago this was an important place for the neolithic, pre-historic people and continued to stay so throughout Bronze age and Iron age. Ever since the Celtic Period this became a powerful hill fort. During the Roman Era in 43 CE, this place was used from military purposes. After Romans, this place came under the royals of Saxons.
Pic Courtesy: http://www.english-heritage.org.uk/visit/places/old-sarum
That's Salisbury town from atop Old Sarum! In the above pic, at a far away distance, in the midst of the mist, if you strain your eyes, you can spot the Cathedral. Unfortunately in winters the Cathedral closes by 4 and it was 3:30 when we left Old Sarum. I may not go soon again, coz the train ticket itself costs much! Let's see when future takes me there!
TO GET THERE:
Refer to my earlier post.
Dedicated to Venkat