The Great Pyramid of Giza It is the one and only Ancient Wonder which does not require a description by early historians and poets. It is the one and only Ancient Wonder that does not need speculations concerning its appearance, size, and shape. It is the oldest, yet it is the only surviving of the Seven Ancient Wonders. It is the Great Pyramid of Giza.
I love also The Basilica di Santa Maria del Fiore and its Dome facade. Read the history on Wikipedia.
And here in caedes with my long distance photo of the Florence Dome
and maybe i'll vote for the Neuschwanstein .
What is your preference?......