Ideally located on Casino Square, this rococo-style landmark dates back to 1864 and is renowned for its extravagance. Multimillion-dollar renovations began in 2014, but the hotel is still open with a reduced number of rooms, and renovations are slated for completion in 2018. The historic property was once the haunt of crowned heads, statesmen, artists, and movie stars from Erroll Flynn to Winston Churchill. The current spruce-up will conserve the most important architecture but transform the much-needed dowdiness of some of the rooms, replacing tired relics with new furnishings and high-tech amenities. Old World elegance still prevails, though: The bath linens are embroidered with the hotel’s monogram. Breakfast is served on gold-trimmed Limoges porcelain. And the discreet personalized service is legendary.