Modern wind turbines such as the Vestas NM82 are extremely tall. The diagram below compares a Vestas to the Eiffel Tower. The Eiffel Tower stands at 1000 feet whilst the Vestas is at least a third of its height. They are massive structures in their own right.
Being so large they are capable of producing more electricity than has been produced by previous wind generators (turbines). Each Vestas can produce enough electrical power to provide the needs of 475 standard sized homes.
However, the cost of construction and installation is near £1 200 000 ($1600 000). It takes along time for the wind turbine to pay back its cost of manufacture.