  We construct a large family of supergravity solutions that describe BPS
excitations on AdS_3 x S^3 with angular momentum on S^3. These solutions take
into account the full backreaction on the metric. We find that as we increase
the energy of the excitation, the energy gap to the next non-BPS excitation
decreases. These solutions can be viewed as Kaluza-Klein monopole
``supertubes'' which are completely non-singular geometries. We also make some
remarks on supertubes in general.
