On the east side of Dique No. 4, aging cement heiress Amalia Lacroze de Fortabat (widely considered Argentina’s wealthiest woman) has erected a modern four-story display space for her personal art collection.

Despite a reputation for cultural conservatism—she once indignantly retracted a fiction prize because she considered the novel her independent judges chose to be pornographic—the collections include some of Argentina’s most cutting-edge modern artists, including Antonio Berni, Jorge de la Vega, and Xul Solar, as well as European masters and contemporaries. Even a Warhol portrait of Fortabat herself is on display.

New in late 2008, the Colección de Arte Amalia Lacroze de Fortabat (Olga Cossettini 141, tel. 011/4310-6600, www.coleccionfortabat.org.ar) is open noon–9 p.m. Tuesday–Friday, and 10 a.m.–9 p.m. weekends. Admission costs US$4, with US$1 discounts for children under age 12, students, educators, and retired people.

Guided tours (in Spanish) take place at 3 and 5 p.m. on open days; English-language tours require advance reservations.