Copenhagen, Denmark

The allure of Hans Christian Andersen town is irresistible from May through October. April, in contrast, marks the tail end of Scandinavia’s brisk spring, making Copenhagen one of the world’s cheapest places to travel this month. Those that take advantage of low-season rates are in for another treat: the seasonal reopening of Tivoli Gardens, one of Europe’s oldest and most charming amusement parks. After a spin on the wooden roller coaster or the Star Flyer, the world’s second-tallest carousel, stop by Kähler i Tivoli for a traditional open-faced sandwich snack.