The Museum of Design Atlanta is in the final week of SALT: A Design Story, and its calendar lists a staff-led tour today from 3 to 4 p.m. at 1315 Peachtree Street NE. The exhibition closes October 31. The premise is delightfully ordinary: salt is a small mineral that forced people to invent extraordinary ways to harvest, preserve, transport, tax, and trade it.

Exhibits span ancient salt mines, industrial landscapes, cities built around trade, and a collection of salt-and-pepper shakers. There is even a tasting station featuring salts from different places, including a local Atlanta maker. The show connects industrial design to the things that end up on a dinner table.

A tour is worth considering if you enjoy engineering, objects, and stories about how constraints produce good design. The calendar lists the Sunday tour, while admission and any separate registration should be confirmed on MODA’s site. If today is inconvenient, the final Saturday tour is listed for October 31.