Expedia is your one-stop shop for booking every aspect of your holiday. Find the right car hire to tour around Planetarium of the Royal Observatory of Belgium, then add on your flights and hotel to secure the best possible price. Many car hire companies include free cancellation, so there's no need to stress if your plans change. Be sure to join Expedia Rewards to earn points on your car hire and other bookings. They'll help you save on your next adventure, whether that's a weekend in the city or a month-long road trip!