I suspect you're referring to Massachusetts - https://en.wikipedia.org/wiki/Telephone_call_recording_laws#...

    Massachusetts (only "secret" recordings are banned, but is the only state without a "public location" exception. Despite having a 1968 law imposing general bans on taping wire and oral communications, it was later ruled to violate the First Amendment in the conditions espoused in a case filed by Project Veritas in 2018.)

This also be more related to recording phone calls and specific conversations.

https://www.dmlp.org/legal-guide/massachusetts-recording-law

It appears to be more nuanced than "you can't walk around with a camera recording in Massachusetts."