Trains are usually most expensive. They are also often delayed. Exceptions are some subway systems (Boston, New York) and the Acela Express. To "explore some o

Trains are usually most expensive. They are also often delayed. Exceptions are some subway systems (Boston, New York) and the Acela Express. To "explore some of the towns", you really need a car. Our fuel is cheap if you avoid the west coast. Right now fuel is $2 to $3 per gallon, which is about 0.5 to 0.7 €/L and about 36 to 54 ₹/L Flights are cheap to hubs and to some tourist places. You could fly to one of those places, then rent a car to drive out and see some towns. Choices might be Las Vegas, Orlando, Atlanta, Phoenix, Denver, Salt Lake City, and Dallas. To see the country, I suggest driving on the US highways. Those are the ones marked with colorless shield logos. (the ones with red and blue shield logos are high-speed interstates) For a modest extra fee, you can drive a rental car from one airport to a different airport. For example, you could drive from Las Vegas to Atlanta. Note that the hub airports tend to be in hot places. Be sure you know what you are getting into if you fly into a place like Phoenix. The seat belts in your car can become hot enough to cause blisters.