Timbuktu

Timbuktu is a town in the West African nation of Mali.

History
Inspector Cortez and Darryl eventually walked in on the Charmed Ones and Piper's husband Leo Wyatt speaking with the ghosts of their mother and grandmother and became convinced that they were involved with dark magic, which he had always suspected was there due to his experiences as a cop (and perhaps also the death of his own sister, which he'd revealed to Phoebe in their conversation during the funeral). In response, Darryl knocked him out, Phoebe teleported him to Timbuktu via a spell, and then Cole Turner found him and shimmered him over a fire pit. ("Charmed Again, Part 1")