We seem to be bound by limitations and there may be nothing that we can do about it!
Some of the limitations are as follows:
1. Maximum Speed = c (Speed of light in vacuum = 299,792,458 m/s)
2. Minimum Temperature = 0 K (Absolute zero = -273.15 °C)
3. Minimum Energy = h (Planck's constant = 6.62606896(33) x 10-34 m2 kg / s)
I will keep updating this list as and when I come across new limitations. If you are aware of any other limitations, please let me know so that I can add it to this list.