Intramuros

Intramuros is the historical walled city of Manila. It once served as the capital of the Philippines during the rule of the Spaniards. As a deeply historical site, it has more than a few areas of interest. It also has a large underground infrastructure that is seldom discussed, let alone explored.
 * Manila Cathedral
 * San Agustin Church
 * Letran University
 * Governor's Palace
 * Fort Santiago
 * The Ramparts
 * Ruins of the Customs House