If your parents plan to visit the East Coast of the USA, they can enjoy many tours and activities. Here are some popular options:

1. New York City Tour: A guided tour of New York City is necessary for any first-time visitor. They can visit famous landmarks such as the Statue of Liberty, the Empire State Building, and Central Park and explore cultural neighbourhoods such as Little Italy and Chinatown.
2. Washington DC Tour: The capital city of the USA is home to many iconic landmarks and monuments such as the White House, Capitol Hill, and the Lincoln Memorial. Your parents can take a guided tour of the city to explore its rich history and politics.
3. Philadelphia Tour: A tour of Philadelphia allows your parents to explore the city’s rich history and visit famous landmarks such as the Liberty Bell, Independence Hall, and the Philadelphia Museum of Art
4. Niagara Falls Tour: A Day trip to Niagara Falls from New York City is a popular option. Your parents can take a boat ride to the falls and experience the breathtaking views of the cascading waterfalls.

Make sure to book tours and activities in advance to ensure availability and to make the most of your parents’ trip to the East Coast of the USA.