Fort Santiago, once the guarding fortress of the city and the Pasig River, is now a war memorial.

CNN: Make the most of Manila's chaotic charm

Focus is on rehabilitating the Pasig River through Manila.

FORBES: 2012 Southeast Asian Philanthropists

Manila sprawls east from Manila Bay along the Pasig River, and immediately south of the river is Intramuros, the old walled Spanish town where many of the city's historical sites are found.

CNN: ASIANOW - Travel Watch | Manila City Guide: Environment