(ˆ◡ˆ) When to use ▬► IN (ˆ◡ˆ)

When to use ▬► A

✮Vado a + CITY/TOWN

✮ Vado + IN + COUNTRY/CONTINENT/REGION/STATE/ISLAND

I’m going to Florence ▬► Vado a Firenze
I’m going to Perugia ▬► Vado a Perugia 
I’m going to Roma ▬► Vado a Roma
I’m going to Assisi ▬►Vado ad Assisi (ad in front of a place that starts with a vowel)