Tripods and selfie sticks are usually banned on observation decks.

No.

Most major observation decks—Empire State, Top of the Rock, Skydeck Chicago, etc.—don’t let you bring either. Tripods are a tripping hazard in crowded spaces, and selfie sticks are treated like weapons (because people have whacked others with them). Security will make you check them or turn you away.

If you want stable photos, brace your phone against the railing or bring a tiny tabletop tripod that fits in your pocket—some decks allow those, but check ahead. Better to call or check the FAQ before you haul gear up there.

You don’t want to be the person arguing with a guard about a twelve-inch stick while everyone else enjoys the view.