Similarly, Sacramento is a major center for the California healthcare industry, as the seat of Sutter Health, the world-renowned UC Davis Medical Center, and the UC Davis School of Medicine, and notable tourist destination in California, as the site of the California Museum, the Crocker Art Museum, the California State Railroad Museum, the California Hall of Fame, the California State Capitol Museum, and the Old Sacramento State Historic Park. Sacramento International Airport, located northwest of the city, is the city's major airport. Sacramento is known for its evolving contemporary culture, dubbed the most "hipster city" in California. In 2002, the Harvard University Civil Rights Project conducted for "Time" magazine named Sacramento "America's Most Diverse City". Nisenan (Southern Maidu), Modoc, and Plains Miwok Native Americans had lived in the area for perhaps thousands of years. Unlike the settlers who would eventually make Sacramento their home, these Native Americans left little evidence of their existence. Traditionally, their diet was dominated by acorns taken from the plentiful oak trees in the region, and by fruits, bulbs, seeds, and roots gathered throughout the year. In 1808, the Spanish explorer Gabriel Moraga encountered and named the Sacramento Valley and the Sacramento River. A Spanish writer with the Moraga expedition wrote: "Canopies of oaks and cottonwoods, many festooned with grapevines, overhung both sides of the blue current. Birds chattered in the trees and big fish darted through the pellucid depths. The air was like champagne, and "(the Spaniards)" drank deep of it, drank in the beauty around them. "¡Es como el sagrado sacramento! (It's like the Blessed Sacrament.)" The valley and the river were then christened after the "Most Holy Sacrament of the Body and Blood of Christ", referring to the Catholic sacrament of the Eucharist. John Sutter Sr. first arrived in the area on August 13, 1839, at the divergence of the American and Sacramento Rivers with a Mexican land grant of 50,000 acres. The next year, his party and he established Sutter's Fort, a massive adobe structure with walls 18 feet high and three feet thick. Representing Mexico, Sutter Sr. called his colony New Helvetia, a Swiss-inspired name, and was the political authority and dispenser of justice in the new settlement. Soon, the colony began to grow as more and more pioneers headed west.