Good question since the first year of architecture school is a pretty expensive way to find out you hate it! I knew some one a million years ago who did the Harvard program and it was very intense, just like architecture school: http://www.gsd.harvard.edu/#/academic-programs/career-discovery/about-the-program.html .
They are apparently pretty common, the AIA has a partial list here: http://www.aia.org/education/AIAS075245