Although not the Orient Express the trains can be quite comfortable. All major car rental companies operate in Argentina. Although a little expensive by U.S. standards this can be a good choice for visiting areas close to Buenos Aires like Mar del Plata. A U.S. and some other countries' driver's licenses can be used but to be safe an international driver's license is not a bad idea. Mondays to Fridays from 10.00 to 15.00 hours.
Many establishments offer fast menus at all times.
Ask the clerk at the shop if they are members of this before you purchase. The Dollar is generally accepted just about everywhere, foreign currency can be exchanged in banks and authorized bureaus. Also the dreaded and ever tempting ATM machine can work with your bank card, talk to your card's issuing company before leaving about this. The most commonly accepted credit cards are American Express, VISA, Diners and Master Card. There may be difficulties in changing traveler's checks outside of Buenos Aires.