The most visited cities in the U.S. for tourists include New York City, known for its iconic landmarks and cultural attractions; Las Vegas, famous for its casinos, shows, and nightlife; Orlando, home to major theme parks like Walt Disney World and Universal Studios; Los Angeles, offering Hollywood, beaches, and entertainment; and Miami, known for its vibrant nightlife, beaches, and Latin-American influence. These cities attract millions of visitors annually due to their unique attractions and experiences.