  Deformations of gauged WZW actions are constructed for any pair $(G,H)$ by
taking different embeddings of the gauge group $H\subset G$ as it acts on the
left and right of the group element $g$. This leads to models that are dual to
each other, generalizing the axial/vector duality of the two dimensional black
hole manifold. The classical equations are completely solved for any pair
$(G,H)$ and in particular for the anti de Sitter string based on $SO(d-
1,2)/SO(d-1,1)$ for which the normal modes are determined. Duality is
demonstrated for models that have the same set of normal modes. Concentrating
on $SO(2,2)/SO(2,1)$, the metric and dilaton fields of the $d=3$ string as well
as some of the dual generalizations are obtained. They have curvature
singularities and represent new singular solutions of Einstein's general
relativity in three dimensions.
