If you carry a Bank of America card, you're eligible for free entry to more than 70 museums on the first weekend each month.

The lineup includes museums in 18 states, but those living close to the coasts will have better luck finding a participating venue nearby. The only states in the country's interior represented are Arizona, Illinois, Michigan and Texas. This promotion, begun in May, lasts through next April. It's a vast expansion of the bank's sponsorship in years before, which was limited to a month. Either a Bank of America credit or check card gets you in.