The Dominican Republic is truly a HISTORIC TREASURE trove!   Dominican Museums, Architecture, Archaeology, Monuments and Arts ad Crafts takes you back to colonial times for a taste of Dominican Republic's rich history.     Let AltGreenGO! take you on an unique and unforgetble voyage through the material remains from eminent humans in the past. Most of the leading museums, arts and craft galleries are in and around Santo Domingo, but be prepared to explore urban and rural areas throughout the country.   The Museum of Dominican Man (formerly the National Museum) houses 19,000 pre-Columbian, colonial, and contemporary exhibits relating to the country's history.   The Gallery of Modern Art promotes the music, painting, sculpture, and poetry of both Dominican and foreign artists and writers.   A new complex at the Plaza of Culture houses several museums, the National Library, and the National Theater.   The Alcazar de Colon is the 16th-century home of the Columbus family; the reputed tomb of Christopher Columbus is in the Cathedral of Santa Maria la Menor.   The Zoological and Botanical garden in Santo Domingo is unique because of its natural setting and grottoes.   Ponce de Leon's fort was declared a historic site in 1972 and is maintained as a museum.