I went to Newport, RI this summer. They have alot of jaw dropping mansions that you can tour. It's quite expensive though. It also has a beautiful beaches and a
very nice "cliff walk." The only problem is the beaches are far too over crowded and the water is 50 degrees at the warmest time of the year, but this problem is the plague of all NE beaches.
If you go to Texas I would suggest San Antonio, home of the world famous Alamo, the Riverwalk, Seaworld, Fiesta Texas, and the World Champion Spurs. Austin is a little over an hour away and is beautiful in its own right. Austin and South Padre might be more fun for the party crowd.
San Fran is a very beautiful with tons of things to do from Fishermans Wharf, Alcatraz, Napa Valley ain't too far, Hade and Asbury (where the hippies used to hang out), Golden Gate Bridge Park, and Chinatown is pretty good to. One more thin about Napa is that it's
seasonal but I forget which season it is, so call ahead or you'll just be looking at naked fields.
New Orleans is pretty good for the parties. Its like Las Vegas, but more culture, from the food to the festivals. Harrahs (in N.O.) casino and Lake Charles have some very good gambling for those you enjoy that. Burbon Street is quite fun even when it's not Mardi Gras. Try the graveyard tours though. Just stay out of the French Quarters and you will be all right.
Boston is not my favorite so please excuse me if I'm biased. There are alot of Revolutionary tours around the city, The New England Aquarium and IMAX are ok ( they have this unbelievably large turtle), a hour South you can find Plymouth rock and the MayFlower, there are designer cloth stores on Newbury and Fanquil Hall, parking is
really expensive like in NY ($25/hour), well everything is pretty expensive, there is a restaurant called Bay Tower (I think) which has an unbeatable view of the city but service and food is sub par compared to the price.
Toronto is probably the only place I would live outside of Texas if I had a choice. It is very nice! Only a hour and half from Niagara Falls, which is a complete tourist trap, it has a Tower like the space needle the name of which I forget the name to, Carnival is very fun (Just like in Rio but colder), and the people are friendly like Texas.
Lake Tahoe/Reno is a
MUST for every couple. Just the view of the snowcapped mountains surrounding an untouched lake is priceless. The are a few things you can do though which include getting married, gambling, winter sports, and bedroom activities.

I also recommend the drive from Sacramento, over the mountain and trough the hills is also very nice.
Mexico, if you are looking for wild parties go to Cancun, everyone else Cozomel & Monterrey are very nice and kind of resorty. Laredo was an old stomping ground of mine and is only ok for cheap crafts, drinking and a whole lot worse. It like Tijuana Lite. Neither of which I recommend unless you are into drink yourself into a stupor.
Wahington DC, is also another must. The mall has the monuments, the Smithsonian is great, and there is the White house too. Definately a must see.
Feel free to PM me if you guys want any more info on these cities and I probably have a few more stuck in my head.