The artwork – an environmental piece consisting of granite block designs among a landscape – cost $40,000 to create as part of the Arts on the Line program.

[1] Untitled is a large-scale outdoor piece, covering some 3 acres (12,000 m2) on a parcel of land nested between Alewife Brook Parkway (MA-2/US-3/MA-16), the main station entrance, and the five-story parking garage.

[2] An elongated artificial pond is surrounded by a grassy area with trees and decorative pavers, intended to be a "usable space for MBTA commuters and community residents" while also serving as part of the drainage system necessary for the large concrete garage structure.

The blocks were designed to be durable, lasting as long as 75 years, as per City of Cambridge public art standards applied to the project.

Pallas Lombardi, who directed much of the Arts on the Line project and served as a liaison with the Cambridge City Council, recalled in a 1987 article that "Harry insisted that Richard not plant trees along the garage, saying bus exhaust would kill them, but I think perhaps he didn't want trees hiding his beautiful garage.