What are the tickets for the must-visit attractions on the Road trip in the United States that need to be purchased online in advance? My Road trip route in the United States this time is from San Francisco to Yosemite National Park, Stanford, Highway 1, Hearst Castle, Solvang, Los Angeles, Universal Studios, Kodak Theatre (Hollywood Walk of Fame), Grand Canyon South Rim, Upper Antelope Canyon, Hoover Dam, Las Vegas, fly to Washington, Lincoln Memorial, all museums around the White House and Capitol, Times Square, Empire State Building, Statue of Liberty, Broadway shows, Wall Street, Columbia University, United Nations headquarters. Among these parks and attractions along the way, which ones are free to enter? Which ones are very necessary to buy tickets or make reservations online in advance to save queuing time? Where to buy tickets separately? Please experts and travel enthusiasts give detailed guidance!!! Thank you very much! ? United States Q&A
Who knows how to buy tickets for the Belgrade National Theatre online ? Germany Q&A