Well, if you can do that, then why are you asking US? Just do it, as the old slogan said.
How about Quebec City (outside the US, but still close)? I’m going there as part of a trip after finals week, and I just picked up a Fodor’s book about it at the library. It is very European, and it sounds very walkable.
Now if I could remember more of my high school French…
Heh. Just exploring my options.
Boscibo, my French is atrocious. Although I suppose if I survived a week in Paris I’ll be okay in Quebec.
Ah, decisions, decisions. Right now the weather is enough to convince me I should just shut up and head for the nearest beach.
I feel like I’m campaigning for the PNW lately, but I posted in the “husband getaway” thread about Yachats, Oregon. We spent our first anniversary in a little house with a deck overlooking the rocks and ocean. When the tide was in, the plate glass wall on the back of the house would get sprayed by the waves. We spent a long weekend there just watching storms over the ocean, and enjoying each other’s company. It was wonderful being there with him, but sometimes I think about spending a weekend in that same house, reading and hanging out on the rocks, watching the waves.
Definitely a quiet vacation, if that’s what you’re looking for. Portland and Seattle are nice to visit, too, but not so quiet.
BTW, Quebec City is doing tons of celebrations this year for its 400th anniversary. It does have a lot of lovely sights (it’s a World Heritage site and North America’s only fortified city).
I was going to suggest Boston. I was just there this fall and it was extremely easy to get around without a car and there’s lots to do and see that you don’t need another person for.
Go west, young man ! You haven’t seen the U.S. if you haven’t seen the West. But you need more than a week-end.
That would be “young lady” to you. 
If I put off my trip 'til May, I may be able to get a US driver’s license in the meantime, which would broaden my options. I have a feeling that I’m going to be busy in May, though, so I’d rather take advantage of my spring break in March.
You should go to Mackinac Island! It’s a little island up in lake Huron right between the upper and lower peninsulas. The use of cars is forbidden there, so the only travel is by bicycle or horse. You can rent bikes very cheaply, hire a carriage to take you somewhere, or rent a horse. It’s definitely an experience to see so many horses used for everyday transportation. I wouldn’t say the beaches are all that great, but they’re nice to look at and you can watch the freighters pass by.
It’s a really nice quiet little community and very unique. There is sort of a touristy aspect to it, though, so if you’re really looking for a truly out-of-the-way place, it might not be the best idea. But it’s definitely worth seeing.
Yeah, spring break is early this year, and los canivales were early also, but you have an advantage in that other travelers are not competing with you. So go to some kind of beach, if that’s what you want. There are many places you can get around in without a driver’s license. In other words, leave the country.
Come to San Diego! You can crash at our house (as long as you aren’t allergic to stupid cats) and there’s lots of stuff to see here. And beaches!
I live with two cats. 
The beaches part is tempting, but I’m leaning towards putting off my trip til May when prices drop. Seems like everyone in the world is looking for beaches in March. Grumble.
My sympathies…
I’m pretty sure they got 'em year-round here-a-bouts!
Not wanting to go to a big city and not having a car is a recipe for limited mobility, but it sounds like you don’t mind just chilling in one place for a few days. What about the Wisconsin North Woods? Assuming that is, that there’s any sort of public transportation to the area anymore, since I’m not sure Greyhound even goes there anymore, what with their service cuts.
There’s no guarantee that anyone but a surfer would want to go to the beach in southern California in March. Two years ago I was in San Diego for the international baseball game, and we got pelted with hale. In April.
Florida is a better bet for beaches at that time.
If you wait until May and can rent a car, the Southwest is great at that time of year. Lots of great stuff to see from the Grand Canyon on down - Zion, Arches, Mesa Verde, etc. And in May, the temperatures are still usually reasonable.
If you’re looking for a quiet getaway, the Pacific Northwest is definitely the spot for you. I went to Washington state a few years ago and was awestruck by its beauty. Head up to Mount Rainier, or take a ferry to the San Juan islands. It’s definitely a good spot to go if you like the outdoors.