Get the map, choose a stop, call the number and listen — it’s as easy to use as an audio guide in a museum. Anyone with a cell phone can enjoy the tour at any time. The tour is free, but your own cell phone charges still apply. The toll-free number is 1-800-644-3545.

There are 13 stops, and each lasts about two minutes. You can visit them in any order you want, at your own pace. After each stop, just hang up and then call back when you get to the next stop. On most cell phones, you can press “send” twice to redial the last phone number.

The whole tour will take about an hour and a half, including walking time.

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