The entire underground bunker has a drainage system and inlets for fresh air and light.

Highlights The bunker had been closed for several decades

Ch Vidyasagar Rao and his wife Vinodha visited the bunker

Malabar Hill served as Summer Residence of British Governors

The bunker opens with a 20-ft tall gate and a ramp on the western side.

Tunnel starts from a big workshop type area and built with lots of ventilation and drainage area. pic.twitter.com/R1b9VIf7fw Devendra Fadnavis (@Dev_Fadnavis) August 16, 2016

A 150-metre long underground British era bunker which had been closed for several decades was discovered by Maharashtra Governor Ch Vidyasagar Rao inside the Raj Bhavan complex at Malabar Hill in Mumbai.Mr Rao accompanied by his wife Vinodha visited the bunker today, after which the Governor expressed his intention to consult experts from various fields to preserve it.The Governor had directed to get the bunker opened after he was informed by old-timers three months ago about the presence of a tunnel inside the Raj Bhavan.On August 12, the staff of the Public Works Department at Raj Bhavan broke open a temporary wall that closed the entrance to the bunker on the eastern side, the official said in a statement.Instead of an underground tunnel, an entire barrack with 13 rooms of different sizes was found.The bunker opens with a 20-ft tall gate and a ramp on the western side. There are long passages and small to medium rooms on either side, he said.The bunker spread over an area of over 5,000 square feet has rooms bearing the name Shell Store, Gun Shell, Cartridge Store, Shell Lift, Pump, Workshop etc. There are also scores of Lamp Recesses in the gangway.Even though the bunker was apparently closed after independence, it was found to be surprisingly intact.Interestingly the entire underground bunker has a drainage system and inlets for fresh air and light, the official said.According to the history of Raj Bhavans in Maharashtra, Raj Bhavan, formerly known as 'Government House' served as the residence of British Governors since 1885 when Lord Reay turned it into a permanent residence.Prior to 1885, the Malabar Hill residence served as the Summer Residence of the British Governors. The Government House at Parel served as the Governor's residence before 1885.