With a stay at Hotel 6400 in Sønderborg, you'll be within a 15-minute walk of Den sorte strand and Flensburg Fjord. This hotel is 1.1 mi (1.8 km) from Den gule strand and 1.5 mi (2.4 km) from Sonderborg Castle (Sonderborg Slot). Take in the views from a terrace and a garden and make use of amenities such as complimentary wireless Internet access. Free self parking is available onsite. Buffet breakfasts are available daily from 7:00 AM to 9:30 AM for a fee. Stay in one of 48 guestrooms featuring flat-screen televisions. Complimentary wireless Internet access keeps you connected, and satellite programming is available for your entertainment. Private bathrooms with showers feature complimentary toiletries and hair dryers. Conveniences include desks, housekeeping is provided daily, and cribs/infant beds (surcharge) can be requested.