Special-Interest Vacations

Art Tours -- Custom tours of Spain that focus on art and architecture can be arranged, especially by Heritage Tours (tel. 212/206-8400 in New York or 800/378-4555 outside New York; www.htprivatetravel.com). Founded by an architect, Joel Zack, these tours can be designed to order, and often include guided trips through such art cities as Madrid, Toledo, Granada, Barcelona, and Bilbao. Without air fares, trips begin at around $3,100 for a 10-day jaunt.

Featuring groups ranging in size from 15 to 25 participants, ACE Study Tours (tel. 01223/835055; www.study-tours.org) in Cambridge, England, offers tours led by an art historian to such cities as Barcelona and Bilbao, and to such highlights of Andalusia as Córdoba, Seville, and Granada. Eight-day trips start at $2,450 (£1,290) and include double occupancy in a hotel, round-trip air fare from London, plus breakfast and dinner daily.