1. Tiffany & Co. The Landmark — Fifth Avenue, Manhattan
The home store of the company that invented the New York jewelry box.
Tiffany & Co. was founded in New York in 1837 and its Fifth Avenue store, reopened after a long renovation as The Landmark, is the closest thing the city has to a jewelry institution.
Several floors cover everything from silver at the accessible end to high jewelry at the top, with a dedicated engagement floor and the six-prong Tiffany Setting introduced in 1886.
It is also simply worth walking through, which is not true of most shops on this list.
Good to know: The upper floors are quieter than the ground floor and the staff have more time there.
727 5th Ave, New York, NY 10022