The Bay Area is the entire region surrounding the San Francisco Bay, including the Peninsula, East Bay, San Francisco, and North Bay, so it covers much more land area than Silicon Valley. In practice, software companies have outgrown Silicon Valley proper. Many companies are now based throughout the Bay Area.
Marathi Mumbai (the former Bombay), capital of Maharashtra state in India, port to the Arabian Sea and one of the most densely populated cities in the world. More about Mumbai. Searchable map/satellite view of Mumbai.
Manila is ranked as the fifth largest urban area in the world, with 22.0 million people. In Manila, as in Jakarta, the population reported to the United Nations is far below that of the genuine urban area.