  We discuss construction and observational properties of wormholes obtained by
connecting two Reissner-Nordstrom spacetimes with distinct mass and charge
parameters. These objects are spherically symmetric, but not
reflection-symmetric, as the connected spacetimes differ. The
reflection-asymmetric wormholes may reflect a significant fraction of the
infalling radiation back to the spacetime of its origin. We interpret this
effect in a simple framework of the effective photon potential. Depending on
the model parameters, image of such a wormhole seen by a distant observer (its
"shadow") may contain a photon ring formed on the observer's side, photon ring
formed on the other side of the wormhole, or both photon rings. These unique
topological features would allow us to firmly distinguish this class of objects
from Kerr black holes using radioastronomical observations.
