nothing to talk about
the parthenon
The Acropolis is a fortified natural stronghold. The Parthenon is built on the Acropolis.
there were many but a common one was the Parthenon
I believe it is the Parthenon the statue of Athena.(This might not be the most famous landmark in Athens but it is very famous)
The Great Sphinx of Giza.
A proper noun is the name of a specific person, place, or thing. A proper noun for the common noun 'landmark' (or 'famous landmark) is the name of a famous landmark; for example, The Taj Mahal, The Statue of Liberty, or The Eiffel Tower.
Athens
The Parthenon was a temple built to Athena the goddess and her name was named after Athens.
Yes, there is a replica of the Temple of Diana, also known as the Temple of Artemis, located in Nashville, Tennessee. This replica is part of the Parthenon, a full-scale reproduction of the original Parthenon in Athens, Greece, and was built for the 1897 Tennessee Centennial Exposition. The Parthenon now serves as an art museum and is a prominent landmark in Nashville.
This seems to be a question of opinion (although I guess you could find out through statistics) but I'm going to say probably the Parthenon in Athens
If you're talking about the replica in Nashville, it is called the Parthenon as well.
Athena Pallas Parthenon