There are multiple sacred texts of Hinduism. Most other religions such as Christianity, Islam, and Judaism only have one main holy book. The Bhagvat Geeta is considered one of the main, important,  and holy texts of them all in Hinduism along with the multiple Vedas and Upanishads.

One very unique thing about Hinduism is that almost everyone is vegetarian. That's because they worship cows, pigs, and other animals.

Unlike other religions, Hinduism really embraces fasting.  People do not always fast everyday, but when they do it's one time per week.

One special thing about Hinduism is that it has no single founder.