A Bundesland is technically a federal state, which is quite a large area in the US, though also large for some states in Germany too. I am mostly familiar with

A Bundesland is technically a federal state, which is quite a large area in the US, though also large for some states in Germany too. I am mostly familiar with Bavaria, a big state where you can get a "Bayernticket", that lets you travel on any public transit in the entire state for a day, and even gets you to Salzburg in Austria. Seems the pricing has changed and is not quite as good anymore, though still a good deal. It used to be you could get one ticket that would cover up to 5 people for about 25 euro. Unbelievable value.