I’ve already featured one geothermal power plant before and that is the one at Tiwi, Albay. Well, if you want to visit a geothermal power plant and you find Albay too far, the nearest one to Metro Manila is the Mak-Ban Geothermal Power Plant located primarily in Bay, Laguna and with facilities also in neighboring Sto. Tomas, Batangas and Calauan, Laguna. The name Mak-Ban comes from the two dormant volcanoes nearby: Makiling and Banahaw, though the power plant is much, more closer to Makiling than it is to Banahaw.
According to this very technical article from the National Geothermal Association of the Philippines, Mak-Ban harnesses the geothermal energy located in the Bulalo Field, which is associated with Mt. Bulalo and Mt. Olilia, two smaller peaks located on the southeast flank of Mt. Makiling. (Mt. Bulalo can be seen on this map while Mt Olilia is the smaller peak to the southwest of Bulalo.)
Mak-Ban all in all has 6 plants: Plants A and B with two 63-MW units each, Plant C with two 55-MW units, Plants D and E with two 20-MW units each, and a binary plant with five 3-MW and one 0.73-MW units. The satellite image thumbnail shows the largest facility of the power plant and where the transmission lines originate from. By panning around in Google Maps, you should be able to see the other plants and facilities scattered elsewhere. I wasn’t able to find a map of the facilities so I have no idea which building corresponds to which plant.
The power plant was first commissioned in 1979 and used to be under the Napocor. But because of the power generation assets privatization effort of the government, Mak-Ban and Tiwi were both auctioned off as a single package in 2008. AP Renewables, Inc., a subsidiary of Aboitiz Power Corporation, won that bid. Aboitiz is in charge of the power generation, while the supplied steam generation is under Chevron Geothermal Philippines Holdings, Inc. Basically, Chevron is in charge of the drilling and the steam while Aboitiz uses that steam for the turbines that power the electricity generators.
If you’re interested, there’s a Facebook album showing a group of students’ field trip to the the Chevron steam generation facilities at Mak-Ban.