41. Become a Smart Sightseer
Museums and art galleries often have specific free-admittance days or evenings, or discounted times when you can see their collections.
Some museums offer a compromise with a pay-what-you-can option that is available throughout the year.
If you're going on vacation abroad, be smart and buy a city pass or city card that will entitle you to free public transportation within city limits and free of heavily discounted admittance to museums and attractions (for example Palma Card in Mallorca's capital in Spain or the Leipzig Card in Germany).