Belgium concentrates the medieval canal cities of Bruges and Ghent, the Magritte and Horta art-nouveau treasures of Brussels, and Belgian beer culture (Trappist abbeys included) into a country smaller than Maryland.
Bruges canals at their most photogenic before summer crowds peak, and Ghent Festival of Flanders runs cultural events from May.
Brussels and Ghent music festivals (Ghent Festival, Tomorrowland nearby), and Belgian National Day on 21 July fills the capital.
Bruges quiets after summer ferry crowds, the Ardennes turn gold for hiking, and Brussels Beer Weekend in early September.
Brussels and Bruges Christmas markets through December, and Belgian winter is grey but Trappist abbeys and chocolate ateliers shine indoors.