Are you familiar with the places where school field trips are commonly held? The short list is in no particular order you can add if I’ve missed a place or two.
Luneta Park, Manila Zoo, Fort Santiago, Museo Pambata, San Agustin Church, Manila Cathedral, National museum, Manila Ocean Park, Star City.
These places especially the historical sites have maintained their stature and cleanliness for years making them popular among local tourists and foreign travelers.
Each tourist spot must have managed their own garbage disposal system well. One or two of them could be maintaining their own composter to keep the facilities clean all the time.
What was the last place in the list that you have visited so far?