<human>: Summarize the given text in a few sentences.

Hey guys,

Me and about 30 other guys are going to the U.S.A. on a study tour for 3 weeks, starting on the 26th, to visit (in order) Boston, NYC, Washington DC, Seattle, San Francisco and Los Angeles. We are students from Twente University in the Netherlands making this study tour to gain international experience and knowledge (in our case of the U.S.). We will be visiting organizations such as Valve Software, nVidia and MIT as for our research on fields such as AI, augmented reality and serious gaming. We will be staying a couple of days in each city, doing a (number of) company visits and some activities/sightseeing. We will be watching an American Football game to give you one idea of what we'll be doing.

After these 3 weeks, me and 4 other students will be making a road trip, starting and ending in Los Angeles. We have planned to visiting some cities (San Diego, Las Vegas) and some NP's (Grand Canyon, Zion, Bryce, Death Valley, Yosemite). 

We are still not sure of what we can see/do there. Therefore my question is, are there any sights we should absolutely see or activities we should absolutely do, which are in one of the places (or close by) that we will travel to? Any questions or tips are welcomed and appreciated!

P.S.1. Most information on the study tour can be found on the website: www.pixel2010.nl (redirects to a page on the website of our student association)

P.S.2. The link to our road trip: 

P.S.3. If there is any other company we should absolutely visit and you might be able to get us in, please p.m. me!
<bot>: I would like some tips on places we really need to see in Boston, NYC, Washington DC, Seattle, SF, LA, CA, Arizona, Utah.