The impressive Royal Greenhouses are situated on the beautiful Royal Property of Laeken in northern Brussels. The King and Queen of Belgium are kind enough to open their massive (270,000 sq ft) glass and iron greenhouses to the public for three weeks every year... perfect timing for my mom's recent visit! The complex was commissioned by King Leopold II, designed by Alphonse Balat (Victor Horta's teacher), and built between 1874 and 1895. Meandering along the mile-long path of beautifully landscaped gardens and colorful flora is also an excellent opportunity to admire early Art Nouveau architecture. My mom and I give the Royal Greenhouses of Laeken two (green) thumbs up!