Russia's most famous landmark is St.Basil's cathedral.
The most famous landmark in Rome, Italy is thought to be by most The Colosseum.
The Eiffel tower is the most famous Parisian landmark.
the most famous landmark in Turkey is entirely your decision it depends on your opinion!
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)
It is an opinion of what the most famous is so there is really no answer.
bob
Alhambra
It is Abuja
Most likely The Coliseum
It is the Rio Grand
Angkor Wat