https://www.atlantafamilies.org/underground-atlanta-history/
In 1968, the Atlanta Board of Aldermen declared the five-block area of the original downtown a historic site. Many significant architectural features survived from original storefronts, including ornate marble, granite archways, cast-iron pilasters, decorative brickwork, and hand-carved wood posts and panels. One-year later, Underground Atlanta opened as a retail and entertainment center. In 1980, The construction of the MARTA rapid transit line and other factors led to the closing of the original Underground Atlanta.
Yet, upon its closing, civic and business leaders succeeded in having Underground Atlanta placed on the National Register of Historic Places and leaders vowed to re-open the area. Underground Atlanta was reopened in 1989, at a cost of $142 million, through a joint venture between the City of Atlanta and private industry. It was redesigned to be one of the major projects aimed at preserving and revitalizing the center of Atlanta as the focal point of community life. Today, Underground offers a complete family experience, with retail shops, specialty and gift shops, fast food in the Old Alabama Eatery, unique features and entertainment, special events, and fine restaurants.