On a budget, Santorini Arts Factory (Tomato Industrial Museum) still earns its price.
~€5
An offbeat, genuinely interesting small museum about the canning industry that once defined Santorini's economy, set in an atmospheric old factory. The catch is it's niche — charming if you like industrial heritage and local history, forgettable if you just want views. A good rainy-day or beach-break pairing with Vlychada.