We investigate properties of
an (n− 1)-sphere Σ topologically embedded in the n-sphere Sn(n ≧ 6) implying that
each (n− 3)-dimensionaI polyhedron in Σ can be homeomorphically approximated by
polyhedra in Σ that are tame in Sn. In case Σ bounds an n-cell, we relate
these properties and the existence of homeomorphic approximations to Σ by
locally flat spheres “mostly” outside this n-cell. This leads to a negative
result eliminating a natural generalization to Bing’s Side Approximation
Theorem.