Highly recommend adding Taipei to your itinerary.

For those who love sightseeing and hiking, I highly suggest including Elephant Mountain in your Taipei travel plans. The hike might make you question your life choices, but the views will definitely satisfy you! This mountain is perfect for any time of day—morning, evening, or night—and can fit into any other plans you have. Plus, there will always be people hiking with you, so you don't need to worry about safety at all.