1: Introduction to NYC skyline evolution.

2: Skyscrapers of the early 20th century in NYC.

3: The iconic Empire State Building construction.

4: Mid-century modern architecture in NYC.

5: The rise of sleek glass skyscrapers in NYC.

6: Contemporary architectural marvels in NYC.

7: Sustainable skyscrapers shaping NYC's skyline.

8: Future trends in NYC's skyline development.

9: Conclusion on the dynamic evolution of NYC's skyline.