A struggling Depression-era drugstore turned free ice water into one of America's most famous tourist stops. South Dakota wears its history on the land itself, and this landmark is a case in point.

The store began drawing crowds in 1936 after advertising free ice water to passing travelers.

What sets it apart

Today the sprawling complex fills much of the small town of Wall near the Badlands. It is the kind of specific that turns a passing curiosity into a lasting fascination.

Its billboards have been spotted as far away as train stations overseas.

Why it matters

Step back, and a larger picture comes into view: this is South Dakota in miniature, rugged and unhurried. However you come to it, this is a place that stays with you long after the drive home.