After Libyan rebels stormed Mummar Gaddafi's private compound in southern Tripoli, journalists have been allowed to enter the Bab al-Aziziya bunker for the first time.

Underground of Gaddafi's compound revealed.

A mysterious place now revealed.

A network of corridors separates a series of debris-filled rooms, communication centers and offices. One of the offices contains a strongbox and a number of arch lever files, as well as a fax machine and computer terminal.

Letters in Arabic addressed to Muammar Gaddafi's son, Seif al-Islam are found. The finds indicate this was certainly a bunker used by the Gaddafi family, particularly Seif himself.

A rebel fighter in Tripoli said, "Bab al-Aziziya, it's for Muammar house, you know that. Nobody can come in here. But now we are free we can do everything in his house. It's for the people now."

Underground of Gaddafi's compound revealed.

Bab Al-Aziziya lies in southern Tripoli, and occupies an area of about six square kilometers. It is surrounded by anti-fire walls with sites for weapons. The walls are estimated to be four meters high and half a meter thick.

For many years, the compound is regarded as Libya's political center and the symbol of Gaddafi's power. Buildings inside the compound are connected by extensive networks of underground tunnels that lead to adjoining districts and possibly stretch to the Mediterranean coast.

Rebels found no sign of Gaddafi after storming his compound. Some speculate that he and his family have left Tripoli through the secret tunnels.