South Dakota: Deadwood

Price: There are many free activities. Buying into the poker tournament at the casino costs $20.

Location: Western South Dakota, outside Rapid City

Historic Deadwood offers visitors a look at what life was like during the Gold Rush. The city, which was the basis for the HBO show of the same name, offers free and cheap activities — as well as casinos for those who feel lucky — all within driving distance of Mount Rushmore.