Self-described as one of the most 'improbable museums', the National Mustard Museum is dedicated to the beloved yellow condiment. It all began in 1992 when Barry Levenson, former assistant attorney general of Wisconsin, left his job to open the museum.

Today, it boasts an impressive collection of over 6,090 mustards from all 50 states and more than 70 countries. The museum also features an extensive range of antique tins, vintage advertisements and a popular tasting bar where visitors can sample various mustards.

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From fairytales to food and wine: world's most curious museums