It comprises approximately 1,800 acres (7.3 km2) of carefully kept woodlands, streams, dramatic cliff faces, flower gardens, and the James Barry bandshell and picnic spots, as well as its showpiece, Mirror Lake.

He personally spent between $400,000 and $500,000 to clear land, build roads, and construct Mirror Lake with the help of Frederick Law Olmsted, who is best known for designing New York City's Central Park.

Hubbard Park is nestled within the Hanging Hills, a dramatic trap rock mountain ridge overlooking the city of Meriden and the Quinnipiac River Valley 900 feet (274 m) below.

Considered particularly scenic are Merimere Reservoir (punctuated with Mine Island) and Mirror Lake, nestled between South Mountain and East Peak.

From the top of Castle Craig it is possible to see most of the Quinnipiac Valley region, Long Island Sound, and the distant higher peaks of southern New England.

Hubbard Park is transformed with a craft area with booths from different artists, food tent with live music, and games and rides.

The hanging Hills were formed by volcanic activity 200 million years ago during the rifting apart of North America from Eurasia.

Since then, hundreds of feet of the softer sandstone bedrock have eroded from the valley, leaving the dense, hard volcanic trap rock ridge layers standing out far above the surrounding landscape.