VIENNA'S NEWEST INCENTIVE venue is the vast Museum Quarter complex. Its central building, the Kunsthalle, was, in the 18th century, the royal stables. Refurbished and expanded, it now offers the new Halls E and G for private functions. Flanking the Kunsthalle are the new Museum of Modern Art and the Leopold Museum. Each has an auditorium and can be fully rented after hours.

An unusual incentive option is the Majestic Imperator, a luxury train offering varied itineraries from Vienna. A candlelight dining excursion ends with a gypsy concert at a Hungarian castle. A day trip goes to Austerlitz, Czech Republic, where more than 100 costumed actors reenact a Napoleonic battle. Small groups — a minimum of eight — may travel in a car attached to a scheduled train; groups of 100 to 150 can book a private train at their convenience.

The Piaristenkeller, a 300-year-old Baroque monastery, is a special-events venue suitable for dinners; recipes date from Imperial times.

In Graz, Austria's second-largest city, the Old Town was declared a UNESCO World Heritage City because of its many fine Renais-sance, Gothic, and Baroque structures. The convention center, Grazer Congress, in the center of town, is a member of Historic Conference Centres of Europe. Dating from 1885, it has been both restored and modernized. There are 19 meeting rooms, the largest accommodating 1,100 people. It features state-of-the-art technol-ogy (including CAT-6 cabling) and simultaneous interpretation for 15 languages. There is also 31,000 square feet of exhibit space.

An offbeat incentive destination is the spa resort Rogner-Bad Blumau, designed by Austrian architect Friedensreich Hundertwasser, offering extensive spa and holistic health services, plus tennis, Europe's largest golf course, and indoor and outdoor thermal pools. The six-room conference center accommodates 300.