Sited near Rotterdam's soaring cable-stayed bridge at the edge of the water, Hotel Mainport's dark façade - created by MAS Architecture - complements the futuristic face of the city with its wide glass windows that offer grand views of the largest seaport in Europe. Designed by interiors specialist, Feran Thomassen, the interiors of the 215-room Inntel Group property are sultry and dramatic with rich fabrics and deep colours. Every floor is different, with North American, Arctic and European themes subtly incorporated. Added perks are a full service spa and the quay-level cocktail bar that features floor to ceiling windows.