The Crystal Lake Falls Historic District, also known as the Brick Kingdom, is a historic industrial and residential area in Barton, Vermont, United States.

[2] It was added to the U.S. National Register of Historic Places on August 7, 1994.

The latter areas is known colloquially as the "Brick Kingdom", and runs roughly parallel to Willoughby Brook, the outflow from Crystal Lake, which drops about 90 feet (27 m) in a series of falls.

[2] During the 19th century, factories clustered along Water Street, with a variety of manufacturing activities.

Businesses located here manufactured piano works, furniture, ladies cotton lingerie and baseball bats.