If you decide to stay at a 4-star hotel in Karhula, you'll usually find plenty of conveniences to ensure you're comfortable, such as a gym, restaurant and pool. You can experience excellent service and upscale surroundings. Go for a 5-star hotel and you'll get a few extra bells and whistles — think on-site spas, 24-hour front desk and opulent turndown services. You'll most likely get additional amenities and premium services at a 5-star stay, but both are great options for luxury travellers.