  The production at the LHC of boosted top quarks (top quarks with a transverse
momentum that greatly exceeds their rest mass) is a promising process to search
for phenomena beyond the Standard Model. In this contribution several examples
are discussed of new techniques to reconstruct and identify (tag) the
collimated decay topology of the boosted hadronic decays of top quarks. Boosted
top reconstruction techniques have been utilized in searches for new physical
phenomena. An overview is given of searches by ATLAS, CDF and CMS for heavy new
particles decaying into a top and an anti-top quark, vector-like quarks and
supersymmetric partners to the top quark.
