Bee balm, trumpet flower vines are really good as is clover. All flowers attract bees but, bee aware, watch your use of pesticides. The indiscriminate usage of pesticides have had a devastating effect on their population to the point of nearing extinction in a lot of areas.
Depending on where you live there are going to be many options to choose from. If you want them to come back year after year, to avoid replanting costs, be sure you pick varieties suited to your growing zone. You can find that here; http://planthardiness.ars.usda.gov/PHZMWeb/ In my experience it is best to combine bee attractiveness with your own pleasure - so choose plants that you like, and/or are useful, so you get double duty out of them. Most herbs produce modest blooms, but the bees seem to love them - mints of all sorts, oregano, marjoram, basil, thyme, sage, rosemary and coriander/cilantro are all both bee friendly and kitchen friendly. Just be sure to confine your mints or they can take over! As for purely decorative flowers, the list is nearly endless. For Annuals try nasturtiums (my favorite!), Asters, Clover, Marigolds, Poppies, Sunflowers and Zinnias Perennials might include Buttercups, Clematis, Cosmos, Echinacea, Foxglove, Geraniums, Hollyhocks Tansy, Yellow Hyssop and bumblebee fave roses.
This isn't exactly what you asked, but I have to tell you: we have a decrepit old amur maple tree that really needs to be replaced in the yard, but no one touches it because it just hums with bees in spring! It's so loud, even though it is a very small tree (I don't know if this is because of poor siting or natural habit). I just love standing under it in the spring, or even just walking by thinking of something else, and HUM! it brings me back to the moment. It has tonnes of keys as well; is very charming.
Some flowers are more attractive than others. Probably the most well known is clover. You have probably even seen this as a trade description on honey - "pure clover honey." Other flowers would be honeysuckle, lavender and chrysanthemum. These are some where I often see honey bees. If you have any open space where wild flowers grow you will often see honey bees there. There are, of course, many different kinds of bees. There are bumble bees for instance. I am not certain, but there may be a scientific difference between bees and wasps. Assuming we are very generic in our question about "bees" you may find certain wasps attracted to flowers of all types. You can also find bees being attracted to the flowers on trees; apple trees, pear trees, peach trees, tulip popular etc.
Really, any flowers which bloom in the daytime will attract bees, but they seem to be most strongly drawn to red flowers, and they love very fragrant flowers. My grandfather was a beekeeper, by the way, and taught me that, if you aren't afraid of them, and treat them with respect, they'll leave you alone. The only time I was ever stung was when I accidentally stepped on one. Grandpappy had beeskeps behind his house, and I played in his backyard safely and happily. And his honey was heavenly. His favorite (and mine, too), was basswood honey, followed by cranberry-blossom honey.