LinkedIn has a tool for premium subscriptions that enables you to look at an overview of all the alumni who have attended a particular college/university. It also lists the six colleges or university said school is most similar to in terms of where alumni end up. Here are some schools I've looked up- lots of expected things, but some unexpected things as well. Have a college in mind that hasn't been looked into? Post it here and I'll tell you what the six most similar schools are.
Universities
Johns Hopkins: URochester, Brandeis, Cornell, UVA, UMD, Duke
Duke: UPenn, Cornell, Vanderbilt, Dartmouth, UNC, Columbia
Rice: UIUC, Cornell, UC Berkeley, Stanford, WashU, UT Austin
WashU: UPenn, UIUC, UFlorida, UW-Madison, UM, McGill
Tufts: UPenn, Harvard, Brown, WashU, Duke, Columbia
Vanderbilt: UPenn, UVA, UW-Madison, Boston College, UNC, Duke
UNC: UVA, UIowa, University of Southern Carolina, UW-Madison, Duke, UGeorgia
UVA: UPenn, UMD, UNC, Notre Dame, UCLA, Columbia
Georgetown: UPenn, UVA, GWU, American, Duke, Columbia
Northwestern: NYU, Harvard, UChicago, Duke, UCLA, Columbia
UChicago: URochester, Northwestern, UW-Madison, Duke, Notre Dame, Columbia
Notre Dame: UPenn, UIUC, UVA, UFlorida, UW-Madison, McGill
William and Mary: UVA, Wake Forest, IU-Bloomington, UMD, UChicago, Notre Dame
Liberal Art Colleges
Williams: UPenn, Harvard, Princeton, Brown, Yale, Columbia
Amherst: Princeton, Harvard, Brown, Dartmouth, Williams, Yale
Pomona: Harvard, Brown, Stanford, Amherst, UChicago, Yale
Swarthmore: Haverford, Pomona, Amherst, UChicago, Yale, Carleton
Bowdoin: Williams, Middlebury, Amherst, Yale, Bates, Colby
Middlebury: Harvard, Dartmouth, Wesleyan, Colorado College, Furman, Columbia
Claremont McKenna: UPenn, Princeton, UVA, Dartmouth, Georgetown, Columbia
Carleton: St. Olaf, Grinnell, Pomona, Whitman, Macalester, Swarthmore
Wellesley: Smith, Mount Holyoke, Vassar, Wesleyan, Amherst, Barnard
Davidson: Wake Forest, Emory, Amherst, Yale, UNC, William and Mary
Wesleyan: UVA, Brown, Middlebury, UChicago, Yale, William & Mary