Interstate Hotels & Resorts has expanded its footprint. The management company recently opened four new hotels in Europe and a regional office in Amsterdam. Interstate Hotels & Resorts’ Borealis properties to recently open include the Hotel Indigo The Hague in the Netherlands, which sits opposite the royal Noordeinde Palace; Aparthotel Adagio Amsterdam City South, part of greater Amsterdam; the Hampton by Hilton Antwerp Central Station in Belgium; and the Holiday Inn Express Amsterdam City Hall. Interstate also assumed management of the newly opened The Alexander, a Luxury Collection Hotel, Yervan, an upper-upscale property in Armenia’s capital city. (Interstate joined forces with Borealis Hotel Group earlier in the year.)