Are you the one who takes care of these? The gravestones?
Seeking answers about the time he missed in New York, Danny visits an unnamed cemetery where his family’s graves are located, including one for him as well.
The Green-Wood Cemetery in Brooklyn was where this sequence was filmed. It was filmed near the Crescent Water pond with the Niblo Mausoleum behind Danny, as seen in the last image below. This cemetery has been host to many other Marvel properties, including Daredevil Season 2, Daredevil: Born Again Season 2, and Punisher: One Last Kill.
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(Iron Fist S01E03, 2017)