The Great Temple at Abu Simbel
Have a look at the size of the people going in the temple to get an idea of how big this actually is.
This was built for and by Ramsses the Great (well he paid for it anyway). It took 20 years to build and was completed around 1265 BC. It is considered to be the greatest and most beautiful temple in all of Egypt.
The statues are 20 metres high and the whole temple 30 metres wide. It is, on all accounts, massive!