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It is well known that there are a great many apparently consistent vacua ofstring theory. We draw attention to the fact that there appear to be very fewCalabi--Yau manifolds with the Hodge numbers h^{11} and h^{21} both small. Ofthese, the case (h^{11}, h^{21})=(3,3) corresponds to a manifold on which athree generation heterotic model has recently been constructed. We point outalso that there is a very close relation between this manifold and severalfamiliar manifolds including the `three-generation' manifolds with \chi=-6 thatwere found by Tian and Yau, and by Schimmrigk, during early investigations. Itis an intriguing possibility that we may live in a naturally defined corner ofthe landscape. The location of these three generation models with respect to acorner of the landscape is so striking that we are led to consider thepossibility of transitions between heterotic vacua. The possibility of thesetransitions, that we here refer to as transgressions, is an old idea that goesback to Witten. Here we apply this idea to connect three generation vacua ondifferent Calabi-Yau manifolds.

Triadophilia: A Special Corner in the Landscape