The ABS-CBN Broadcasting Center in Diliman, Quezon City, the Philippines is the main headquarters of ABS-CBN Corporation and its subsidiaries. It consists of a triangular compound with an area of approximately 44,000 square meters. It was originally built in 1968 and was then the most advanced broadcast facility in Asia until March 1973 when NHK Broadcasting Center in Japan was formally opened. Today it is now the country's largest and most technologically advanced broadcast facility, capable of broadcasting multiple and simultaneous live SD or HD audio-video feeds to any parts of the world and vice versa. The complex contains several buildings, studios, backlots as well as a chapel, a health center, a garden, and the 720 foot Millennium Transmitter. The Pinoy Big Brother studios and backlots are in a nearby lot in front of the complex. The ABS-CBN Studios can be toured through the company's ABS-CBN Studio Tours.