People have been living in what is now the Tucson area for more than 4,000 years, making this one of the oldest continually occupied regions in the United States. The area around downtown Tucson is the heart of the community, made up of six distinct districts. Visitors looking for regional wares, international dining, live entertainment, and colorful events needn't venture far for a true sense of the Old Pueblo. And come summer 2014, Sun Link-the modern streetcar- debuts, providing easy access to each district, from University Medical Center through The University of Arizona, Main Gate Square, 4th Avenue, and downtown.
Much of downtown is made up of local businesses and museums located in adapted historic buildings, from 1840s Mexican adobes to early 20th-century theaters. Look for B in this guide for historic buildings and spots to experience Tucson's unique heritage.
Main Gate Square connects the oldest part of The University of Arizona campus, which opened in 1891, with West University Neighborhood, which developed between the 1890s and 1930s along Tucson's first streetcar route.
Pedestrian-friendly 4th Avenue was one of the earliest commercial districts to develop outside of central downtown, and showcases a variety of architectural styles from the 1910s to 1940s.
The riverbank beneath Sentinel Peak ("A" Mountain) is Tucson's birthplace, where people have lived continuously for more than 4,000 years and maintained an agricultural oasis for most of that timespan.