Since I was a child I’ve been intrigued by what lay behind the mysteriously secretive railings of Queen Street Gardens, one of Edinburgh New Town’s many private gardens.

Normally you need to be a resident of a neighbouring street to obtain a key to the gates. But for one weekend a year, on Doors Open Day, the gates are thrown open to the wider public.

Well, one of the gates is. When we arrived at the south side of Queen Street Gardens’ eastern district, we found it locked as normal. Walking further, we found a sign informing us to enter at the opposite side, at Abercromby Place. You mustn’t make it too easy to enter, after all.

Among the interesting things to see are the Nissen hut, originally used as a bomb shelter and now used as a shed.

At the other end is the Temple of Pluto, a 1980s structure designed to disguise a gas pressure regulating station.

The central garden was also open. Most notable here is the pond and island, which is said to have inspired Robert Louis Stevenson (who, as a child, lived on the adjacent Heriot Row) to write Treasure Island.