end the cuban embargo, americans have the right to travel

The cuban embargo has in place 50 years, the cold war has over for 20 years, so why is it still in place, its very outdated. The U.S. allows americans to trave to the other communist countries like vietnam and china. The U.N. has called on the U.S. to end the embargo, but they still refused. Ending it will actually benefit both countries Cuba will have increased tourism and the U.S. image will look better around the world.
ps i dont see anywhere on the constitution the prohibition of travel