From late April through May, millions of bluebells blanket the Hallerbos, also known as the ‘Blue Forest’ of Belgium, located in the municipality of Halle, 20 km south of Brussels. As far as the eye can see, a flowering carpet brushes up against the slender beech trees in the 1,360-acre forests' unearthly transformation. Visitors can meander the twisting roads while keeping an eye out for deer and rabbits that wander through the lush, emerald woodlands. Though bluebells are not uncommon in Europe, especially in its oldest woods, the Hallerbos is exceptional due to the quantity and quality of its bloom.