According to
Judeo-Christian mythology, a location (equated by some to be
Babylon) where there was erected a colossal
tower the purpose of which was to reach
heaven.
God frowned upon this endeavour, halting the construction the whereby workmen found that none of them could understand each other because they were now all
babbling, i.e. speaking different
languages.
This is also the derivation of the Babel fish.