Generally, no, you cannot use a Eurail pass on city metros, buses, or trams. The Eurail pass is specifically designed for travel on the national and international railway networks of participating European countries. Local public transit systems (like the Paris Metro, London Underground, or Rome Metro) are operated by separate city authorities and require their own tickets or contactless payments. However, there are a few notable exceptions. In Germany and Austria, the S-Bahn (suburban rail) is often operated by the national carrier (DB or ÖBB) and is usually included in your pass, which can be a great way to traverse cities like Berlin or Munich. In London, you can use the pass on the Elizabeth Line to reach Heathrow. Most Eurail passes also provide discounts on certain private ferries and regional buses. To be safe, always check the "Rail Planner" app; if a specific route doesn't show up in the app's search, it is likely not covered by your pass, and you will need to pay the local city fare.