Chinese New Years in Central Taiwan

My wife and I are new comers to Taiwan, and right now have limited transportation and finances.
Nonetheless, we’re looking to have some fun and see the sights during New Years vacation (Feb 15-20th). We live just south of Caotun and want to know:
Where should we go?
What should we see?
Looking for suggestions in Central Taiwan (not Taipei, maybe next year). Thanks in advance!