This is 1 / 5 caches placed on the walkway system of Makati CBD.
Tried walking on other CBDs (Taguig and Ortigas) and they don't have this kind of walkway with a metal roof on it.
I'm not sure how they chosen to built since not all walkway has a shed that you can walk on.
Great help when it's raining hard or the sun shines brightly that fries your skin.
The hides were done same way for all caches. If you find one of them, then finding others is easy breezy.
Practice stealth since these walkways can be pretty busy.
Suggest you to check the map first before going rather than relying in your GPS since it can be jumpy because of the tall buildings around the area.
Prepare to get your hands dirty.