It’s pretty amazing what you can do with some old stables. Vienna’s vast former quarters for the imperial horses, designed by the great baroque architect Johann Bernhard Fischer von Erlach, were turned in recent years into the MuseumsQuartier. It could take days to see all the works in this 15-acre, multi-museum complex that lies just off the Ringstrasse and is devoted to collections of modern and contemporary art. The limestone Leopold Museum for Austrian art is named after an early collector of the bold painter Egon Schiele. Its Café Leopold includes courtyard seating under umbrellas. For your Picassos and Giacomettis, the nearby MUMOK specializes in the giants of modern art. The MuseumsQuartier’s huge courtyard is a popular Vienna hangout where many festivals take place and DJs spin on weekends.