<human>: I'm going on a cruise next month. Can you recommend a few must-see places?
<bot>: 
1. The Grand Canyon is one of the most iconic landmarks in the United States and should definitely be on your list.
2. Another great destination to visit while on your cruise is the city of New York, which has plenty of attractions like Times Square, Central Park, and the Empire State Building.
3. If you're looking for an adventure, consider visiting San Diego's SeaWorld or Florida's Disney World.
4. For those who love nature, take a day trip to explore Yellowstone National Park.