The cache is a plastic container, with a logbook and few objects.
You'll need to bring a pen for this one.
Description:
Hua Lin Corner: Hua Lin Means the point where a water channel
begins. In the past the water that fed the moat and the city came
from the Huay Kaew stream, which entered the moat at this corner.
Consequently, this corner of the city was called Hua Lin.

(Photo Credits: lasplash.com)
History:
Chiang Mai is also known as the Rose of the North, and is an
important city in the northern region. Chiang Mai is a city filled
with ancient sites, antiques and examples of the old Lanna culture.
It was established 709 years ago by King Meng Rai, the original
ruler of the Meng Rai dynasty and is one of the oldest cities in
the northern region.
Chiang Mai was designed in a rectangular shape, with a perimeter
wall including four gates and a surrounding moat.
Being a rectangle, there are four corners, each with its own
significance.
Over the decades, the four corners have degenerated, but they
have been renewed continually as have the city walls and gates. One
of great periods of rebuilding took place in the King Gawila period
in 1801.

(Photo Credits: fluoride)
The latest refurbishment took place in 1997 but there are no
plans to renew the four corners again. The government has not
approved permanent funds to renew the corners. It would be
regrettable if the four ancient places are abandoned and degenerate
as time passes. Local residents should be active in pressing for
conserving and renewing them, not only the corners, but also the
adjacent areas because they are important Chiang Mai symbols.
Recommended for photographers and historians.
References:
http://www.yupparaj.ac.th
http://www.chiangmai-mail.com
Small note on cache maintenance: geojane2u has
graciously offered to assist. Thanks!