Ruins, fountains and long dinners
Tap water is safe. Rome's free 'nasoni' street fountains are drinkable — refill bottles.
Not expected — no US-style % service tip; round up or leave a euro or two for good service. The 'coperto' is a cover charge, not a tip.
Drive on the right. Watch the ZTL (Zona Traffico Limitato) — camera-enforced restricted zones in almost every historic centre; drive in unknowingly and the hire car gets a fine weeks later. Autostrada tolls use Telepass lanes. Most tourists don't need a car in the cities.
sourced — translations from published sources; corrections come from user reports
Free to start. iPhone first — Android close behind.