In 1988 I took my first trip outside of Europe and visited the United States. Since it was my first trip there, I did the basic 'Western USA' tourist route, which seems to be one of the standard trips for first time tourists.
First stop was San Francisco, which is a convenient place to start since it's reasonably similar to European cities, compared with Los Angeles or Las Vegas.
The next stop was Los Angeles, with the usual tour to the Hollywood Bowl, Grauman's Chinese Theater, Universal Studios and Disneyland.
From there it was on to Las Vegas and onwards on a sightseeing flight across the Grand Canyon to the Grand Canyon National Park. To get a sense of scale, look for the waterfalls on the first image.
Oddly enough, later travels brought me back to all those places I visited on my first USA journey. I was back in San Francisco in 1991 and 2000, went to Los Angeles in 1993, visited Las Vegas in 1991 and 2002 and went back to Grand Canyon National Park in 2002.