9Hôtel Sablon
Squirreled away down a small lane off Grand Sablon square, this is a more modern boutique stay than the usual grandes dames you'll find in this area. Certainly, its subterranean pool is moodily chic, and this Parisian chain doesn't skimp on its retro theme: light woods and blockish furnishings, a Finnish sauna, and a general air of days gone by complete a charming picture. It also has another branch next to the Cathedral of St. Michael and Ste. Gudula.