If you choose to holiday at a 4-star hotel in Petrohrad, you'll usually find loads of amenities to keep you comfortable, such as a restaurant, gym and pool. You can look forward to excellent service and upscale surroundings. Opt for a 5-star hotel and you'll have access to a few more perks — think on-site spas, around-the-clock concierge and opulent turndown services. You'll most likely get more amenities and first-class services at a 5-star getaway, but both are terrific options for luxury guests.