The Old City

 If you pull up Chiang Mai on google map and zoom in a little, you'll immediately see a perfect square. In the middle of a city whose streets are emphatically not straight. What's up with that?

It turns out the old city of Chiang Mai was surrounded by a canal that served as a moat, and inside that, was a massive brick wall. The wall is now mostly ruined, but the canal is still there.

Old City. northeast corner:

You can see a bit of the brick wall on the right. Same, but further back:

These trees are along the east side. I worry about the second one, it looks like it's going to fall into the canal if it isn't propped up or something.

 

And about that wall...

 not everyone obeys instructions...

 But you have to admire the camouflage.

Old City, North Gate:

 Ruined, yet stately, ancient monument. With cute cheesy plastic elephant statues - because that's how this city rolls. How could I not love it here?

Lastly - this is a relief map of the old city, with several of the important buildings shown in miniature. A little difficult to make out in the mix of light and shade.