The security guards look perplexed and doubtful. They aren&rsquot accustomed to having camera-toting visitors in hats and sunglasses making their way to the deserted Madras High Court. We were joining what was only the fourth heritage walk of the campus, a delightful effort to help citizens connect with the magnificent and frequently overlooked architecture of what&rsquos normally a bustling high-security zone. The Madras HC is the only heritage campus (as opposed to a lone building) that has become thus accessible in the southern metro. Others, like the Theosophical Society, Kalakshetra, Fort St George and the Museum Theatre, are still out of bounds to such efforts.