| Lyell Cave (Grande caverne d'Engihoul) | |
|---|---|
 Lime kiln at eastern entrance of Lyell Cave | |
| Location | Engihoul, Éhein (Engis) |
| Coordinates | 50°34′41″N 5°24′32″E / 50.57806°N 5.40889°E |
| Geology | Limestone of the Viséan |
The Lyell Cave, formerly called Grande caverne d'Engihoul, is located near the ancienne commune of Éhein, municipality of Engis, Liège Province, Belgium. It is one of many caves investigated or discovered by Philippe-Charles Schmerling, in 1831; the cave is named for a later researcher, Sir Charles Lyell, who visited the cave in 1860.
Together with the Rosée Cave, it was classified as an exceptional cultural heritage of Wallonia in July 1988, making it accessible only to scientific researchers. The cave's troglofauna includes Belgium's only cave-inhabiting beetle, Tychobythinus belgicus.