Fodor's Expert Review Hallerbos Forest

About 8 km (5 miles) south of Beersel, you'll encounter the wilderness area of Hallerbos. It's known locally as "the blue forest" for good reason: come mid-April and early May, the ground underneath becomes a dazzling carpet of blue-violet flowers, as bluebells cover every inch. It's a small window of opportunity, though it's a pleasant spot to wander at any time of year. To get there, take the train from Beersel to Halle, then either hire a bike at the station (www.blue-bike.be) and cycle or take the No. 155 bus.