A:
The best Multi-day Tours in USA according to Viator travelers are:
- BEST Niagara Falls USA 2-Day Tour from New York City
- 3-Day US Niagara Falls,Washington DC&Philadelphia Tour from NY/NJ
- 7-Day Tour to San Francisco, Yosemite, Las Vegas, Grand Canyon, and Zion from LA
- 2-Day Yosemite National Park Tour from San Francisco
- 3-Day Tour: Zion, Bryce Canyon, Monument Valley and Grand Canyon