Well it kinda depends on where you gear your essay to.. few tips:
don't start with a question
if you want start with a fact
make it interesting (catching/hook)
New England was unsuitable for agriculture on any large scale due to the rocky and mountainous terrain.
Numismatics is the study or collecting of coins medals and paper money.
Lumbini is where Gautam Buddha was born. He and his teachings are known worldwide.
Mt. Everest is the highest mountain in the world.
That's why they are national pride.