Palais Royal

©Analia Glogowski/Lonely Planet

These days Belgium’s royal family lives at Laeken, but this sturdy 19th-century palace remains its ‘official’ residence. One unique room has had its ceiling iridescently clad with the wing cases of 1.4 million Thai jewel beetles by conceptual artist Jan Fabre. You'll also see contemporary royal portraits. It's only open to visitors in summer.