Fort Bonifacio Tunnel
The 1910 Fort Bonifacio War Memorial Tunnel is a tunnel that was part of Fort William McKinley (renamed Fort Bonifacio), a military base built by the US Military Government of the Philippines in 1902. The tunnel alignment is now part of Taguig's Bonifacio Global City district and the Embo barangays, and is considered a historical site by the Bases Conversion Development Authority (BCDA). The main roads near it are C-5 and Kalayaan Avenue.
Tunnel data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).