I WONDER - How Big Are Wind Turbines?

Wind turbines, though appearing small from afar, are large structures designed to harness wind energy. Over the past 20 years, turbines have increased in size, with each blade averaging 170 feet in length and the turbine itself reaching about 280 feet tall, comparable to landmarks like the Statue of Liberty or Big Ben.

Why do wind turbines need to be very big?

What are some landmarks that are comparable in height to a wind turbine?