You have got to do the Maid of the Mist and Cave of the Winds Tour at Niagara Falls. Cave of the Winds Tour is the best - you are up close and personal to the Bridal Falls...the mist is all over you. I loved it. Also, I am just outside of Washington DC. The Smithsonian Musems are the best and they are free. The Spy Museum is great also but there is a charge. Check with your Congressional Rep and see if you can get tickets for a White House Tour - free. All of the great sites in DC are free - The Capital Tour, The Washington Monument, Vietnam Memorial, Arlington Cemetary (burial place of the Kennedys). Washngton DC is a great place and so much to see. Enjoy your vacation.