A common form of transportation throughout the Philippines is the tricycle (or trike), which is a motorcycle with an attached sidecar. This commoness is unique to the Philippines. Because trikes are usually manufactured locally, styles vary regionally and even between different cities, so they can be quite useful for regionguessing.
We look here at some of the more distinctive styles of trikes in the Philippines.
Trikes are similar to tuk tuks. An example of a tuk tuk is shown below. Tuk tuks can be found in many places around the world and appear in many places in the Philippines (especially in Mindanao), but tuk tuks are usually manufactured in China or India and don't exhibit as much variability in style, so they will be ignored here. Also, in the Philippines there are trikes which use bicycles instead of motorcyles, and these will also be ignored here.

To begin, we first look at some features which appear among trikes in certain provinces or regions of the Philippines. (Here is a map of provinces and regions.) Keep in mind that trikes do travel, and for this reason and others, you may find trikes in unexpected places and, in fact, most places will have more than one style of trike.
Generally the roof of the sidecar and the roof of the driver are farther apart in height in the north and closer together around the center of the Philippines. And flat roofs are more common in the south. But there are exceptions to this rule.
There are more examples from each of these regions in this training map:
https://www.geoguessr.com/maps/68f9887f3a23828c46b117b4
We move north to south.
Northwest Luzon half tarps
Northeast Luzon crowns
Central Luzon mattresses
Calabarzon trikes
Bicol trikes
Eastern Visayas trikes
Northwest Panay backbars
Southwest Panay windows
Palawan trikes
Negros Occidental duck bills
South Cebu long windows
Lanao del Norte square roofsMany cities in the Philippines have a mixture of different styles of trikes. But some cities are dominated by a fairly consistent style. We look at some of these.
There are more examples from each of these cities in this training map:
https://www.geoguessr.com/maps/68f98af55c5b62025214be25
We list these in alphabetical order, with the name of their province in parentheses.
Bayawan (Negros Oriental)
Bayugan (Agusan del Sur)
Bislig (Surigao del Sur)
Butuan City (Agusan del Norte)
Cabanatuan City (Nueva Ecija)
Cagayan De Oro City (Misamis Oriental)
Calbayog (Samar)
Cauayan City (Isabela)
Cotabato City (Maguindanao del Norte)
Cotabato City (Maguindanao del Norte)
Digos (Davao del Sur)
Dumaguete City (Negros Oriental)
Escalante City (Negros Occidental)
General Santos City (South Cotabato)
Guihulngan (Negros Oriental)
Ilagan City (Isabela)
Kidapawan (Cotabato)
Korondal (South Cotabato)
Laoag (Ilocos Norte)
Lapu-Lapu (Cebu)
Maasin (Southern Leyte)
Malabalay City (Bukidnon)
Marawi City (Lanao del Sur)
Masbate City (Masbate)
Olongapo City (Zambales)
Ozamiz (Misamis Occidental)
Panabo (Davao del Norte)
Passi City (Iloilo)
Quezon City (Metro Manila)
Roxas City (Capiz)
San Fernando City (La Union)
Santiago (Isabela)
Sorsogan City (Sorsogan)
Surigao (Surigao del Norte)
Tacurong (Sultan Kudarat)
Tagbilaran (Bohol)
Tagum (Davao del Norte)
Tandag (Surigao del Sur)
Urdaneta City (Pangasinan)
Vigan City (Ilocos Sur)
Zamboanga City (Zamboanga del Sur)