Intramuros is the oldest district in Manila. It's like a small town (only 0.26 square miles) located within walls, hence its nickname the Walled City (and intramuros means "within the walls" in Latin). These defensive walls were built by the Spanish in the late 16th century for protection from invasions. There is a lot of history here, from the Spanish rule, American colonization to World War II. Jason and I had to go to the immigration office, which is located right across the street from Intramuros. After we handled our business, we decided to walk around the wall and the town. You can pay for a guide to take you around or take a kalesa (horse-drawn carriage), but we opted out and explored on foot by ourselves. If you're in the Philippines and into history, definitely check out Intramuros. It's the historic core of Manila.
Read more about Intramuros here.