The Netherlands is famed for its colorful tulips; the best time to see them is April and May, when they're in bloom. Keukenhof, the country's most famed tulip garden, is open from the end of March until the beginning of May, and is perhaps the best place to see flowers. Queen's Day, at the end of April, is the Dutch equivalent of the Fourth of July; the country turns into a giant party with everyone wearing orange.