The Manila Liberation Monument is located near the city centre, near the Manila Cathedral. Like a small garden, there is a statue in the middle. There are carriages around, so you can take a carriage to enjoy the historic buildings around slowly.
Just on the way to St. Augustine from Manila Cathedral, like a small garden, I missed it without notice. It's actually called the Manila Memorial for the Victims. It was built in memory of the civilians who died in the Manila Campaign at the end of World War II. In a cluster of flowers.