Which is the largest botanical garden in the world? Name a few well known botanical gardens in India.

Kew Royal Gardens in London is the world's largest botanical garden.

Some of the well known botanical gardens in India are:

1. Sanjay Gandhi Jaivik Udyan in Patna

2. Hyderabad Botanica Garden

3. NTR Garden, Hyderabad

4. Botanical Garden Sarangpur

5. Cubbon Park, Bangalore