Navigating Guangzhou

Chanced upon a dutch 1700's map of Guangzhou, my Grandparent's town, blew it up, took my Dad and the Map there...and went orienteering!
Discovered that the modern city has mostly retained the old street grid - the oldest thing we found was the remains of a Sung Dynasty bell tower, with Stelae from that era which must have laid about smashed for years by war and weather, before finding themselves partially pieced together and mounted on the walls of the courtyard.
Another site, the Palace of the General, is now a hospital - many sites are still in use today, we found the oldest Mosque in China, which was once on the water's edge (reclamation over the centuries has pushed it about hald a mile inland), some of the major temples still in use and a quaint, all-wooden 2 storey corner house, with wooden pillars perched on round bases, Ming dynasty style. A friendly family from the countryside were living inside this one up, one down house, running a cottage industry making stickers.
We also found that Yen Wei temple, on the edge of a lake and once way out in the sticks to the east of the city walls, revived and in use (it was shut down during the revolution and I remember looking at it from across the water in the late 80's and 90's, when my Grandparents brought us to the park, and wondering what it was), and now very much part of the bustling old quarter of Siguan.