Travel to Istanbul: Sleep on the Banks of the Bosphorus at Hotel Les Ottomans

This has got to be one of the coolest places to bunk down for a night: on the banks of the Bosphorus in Istanbul. Housed in a former Pasha's mansion dating from the 18th century, the Hotel Les Ottomans has postcard-perfect views over one of the most famous waterways in the world. Inside you'll find posh interiors (yup, Paris Hilton stayed here) and a Caudalie Vinothérapie spa that's positively decadent. This elegant hotel also has a pool overlooking the Bosphorus, and yachts both for leisure sails and practical transfers to other parts of the sprawling city of Istanbul.