Once the capital of the ancient Kachari tribe, Dimapur has some mysterious 13th century ruins from the Karachi civilization, which ruled there until the Nagas came down from the hills and took over. These ruins, dotted about Rajbari Park, are perhaps the most interesting attraction in Dimapur. There's also a Wednesday market close to the ruins, which provides an insightful look at Nagaland life. Familiar products such as spices, wicker goods, and vegetables are on sale. However, you'd best avoid the meat section unless you're keen on unconventional offerings such as dog meat.
Most people are quick to leave Dimapur. From Dimapur it's a two to three hour drive to Kohima. Or, if you're in a hurry, a 30 minute helicopter ride.