[2][3][4] The Early Oligocene Engi slates yield many fossils including sharks, bony fishes, turtles and birds.

[5] In 1879, the valley of the Linth river was connected to the Swiss railway network by the opening of the Swiss Northeastern Railway line from Weesen, but Engi, in the side-valley of the Sernf river, remained unserved.

This impacted the local economy, and various proposals were brought forward to provide rail service to the Sernf valley.

[7] The village of Engi is situated at an elevation of 812 m (2,664 ft) on the right bank of the Sernf river.

It includes the village sections of Vorderdorf, Dörfli and Hinterdorf, and is located on and near the road between Schwanden and Elm.

Of the rest of the land, 1.2% is settled (buildings or roads) and the remainder (24.6%) is non-productive (rivers, glaciers or mountains).

[1][8] The Sernftalbus operates an hourly bus service linking Engi with Schwanden railway station, Elm, and other communities in the valley of the Sernf river between them.