In its 99 elegant, luxury rooms (standard, deluxe, superior) and suites (Standard, Superior, residence), the hotel offers accommodation in a relaxed atmosphere overlooking the famous Opatija landmark - a statue of a girl with a seagull.

à la carte restaurant Argonauts is located right next to the promenade promenade below the big arcades Hotel Millennium. The restaurant specializes in fresh fish daily from Kvarner and an extensive wine list with more than eighty-selected wines from Croatian and abroad. The ambiance exudes elegance and luxury, including a special frescoes made ​​by the Viennese painter Ludwig Hassman, after whom the restaurant was named.