In December 2011, adventure traveler / entrepreneur Derek Low spent four days traveling across the USA by train for just $213. The 3,397-mile journey took him across 11 states and through 4 time zones along with allowing him to see both the Pacific and Atlantic Ocean. Low documented the entire epic trip on his site, and we highly recommend you check it out here. If you’re interested in planning a similar trip of your own, Low started a travel planning service that will help you book all your tickets for a small service fee of $49. It’s still going to be cheaper than airfare, and this is a great way to see to the country.