Valentine's Day is fast approaching. If you still haven't planned anything and you feel being a little adventurous, you might want to consider taking your girl to Intramuros and explore other dungeons (for a change).
These are called the Fort Santiago dungeons. It used to house the Spaniards' artillery and gun powder. It was later on converted into prison dungeons.
Fort Santiago is open from 2PM to 10PM daily for visitors. Fee is Php75 for adults and Php50 for students/seniors/PWDs.