Noli me Tangere and
El Filibusterismo -- in its day those books were subversive reading, when the country was still under Spanish rule. Rizal wrote them not because he wanted the Spaniards out, but he wanted them to give Filipinos at least some recognition as citizens as much as the colonizers. However, the authorities thought otherwise, who feared that the novels could be used to destabilize Spain's hold on the country.
If read just like a typical paperback today, the Noli and the Fili are interesting windows into another era.
Biag ni Lam-ang -- I came across this while in high school, and with my imagination at work I found myself laughing between this and early episodes of DBZ and North Star (one example was the hero hitting a villain in the jaw with a strong fist, sending the latter over a range of hills). Actually, this was an Ilocano epic poem, and I'll not be surprised if someone decides to adapt it to a popular TV audience.