In this logo, we see a woman immersed in a yoga position but also notice the visual field between her leg and arm. It is the shape of the Australian continent and by this simple way, the logo represents what it is about and where it is.
P.S: Google Yoga Australia and click on the first link and visit their website. Notice a different logo ? (source)
Without any doubt, Wikipedia is one of the frequently used sites and its globe logo is well recognized among everyone. So, the wiki globe is made up of jigsaw puzzles inscribed with letters from various written systems but why is it unfinished. It is to symbolize that data gathering is ever-growing and essentially the fact that Wikipedia is a work-in-progress. (source)
Google wanted a playful, unique & visionary logo without any bulky art or superfluous colors and they got one from designer Ruth Kedar. Glorious in Times New Roman, the logo is a pattern of primary colors except that the letter ‘l’ is immersed in secondary color just to show that Google doesn’t go by the book, it breaks rules, creates path-breaking discoveries and transcend boundaries. (source)
The ‘M’ in McDonald’s represents something else. When the food chain decided to change their logo in 1960s, a psychologist  and design specialist Louis Cheskin was hired . He recommended them to keep the golden arches. Why? B’coz according to him, the yellow rounded  ‘M’ was imagined as ‘a pair of nourishing breasts’ by consumers unconsciously. According to industrial psychologists , this so called representation manipulates  and triggers consumer action. With this idea imprinted in your minds, your future McDonald’s trip will never be the same. (source)
This impressive logo employs optical illusion which means you have to strain your eyes to grab a look at two distinct images. First, we’ve the image of a golfer in full swing. Now, without any change in shape or position of the logo, you get to see another image – the head of a Spartan. (source)
