One of the Midtown Improvement District’s last truly massive parking lots is off-limits to public cars, encircled by fences, and dotted with “No Trespassing” signs as heavy equipment tears it apart.

All are indications that site work is beginning for one of Atlanta’s largest corporate gets in recent memory, the planned $575 million new headquarters for railroad giant and Fortune 500 company Norfolk Southern.

Cousins Properties is planning a 1.4 million-square-foot development for the Midtown block bordered by West Peachtree, 3rd, and Spring streets, and Ponce de Leon Avenue. The project would include a 22-story glass office tower, and as anchor, Norfolk Southern would take the lion’s share of space (roughly 1 million square feet), according to Midtown Alliance.

A Norfolk Southern public relations representative said Wednesday that no updates are available in terms of the project’s timeline and scope, and building permit records offer few compelling details.

The Atlanta Business Chronicle has reported the HQ building could start construction as soon as next this summer, and Norfolk Southern has ambitions of opening shop in 2021. Ultimately, the site—650 West Peachtree Street—would have roughly 13,000 square feet of retail space, too.

The following photos, taken this afternoon, give an indication of the site’s size, its relation to Midtown landmarks, and the potential scope of work to come.