If you're in dublin for more than a quick weekend, the botanic gardens in glasnevin are genuinely overlooked by tourists. Free admission, gorgeous victorian glasshouses, and usually empty except locals walking dogs

The palm house and tropical ravine are instagram-worthy but somehow not on every tourist list. Perfect quiet spot when you need a break from the city center bustle. About 20 minutes on bus from o'connell street

Tip for introverts - weekday mornings are practically deserted. You can sit in the rose garden and actually think without crowds of people asking you to take their photo