| Metro Alpin | |
| Type: | Funicular, Underground |
| Status: | In operation |
| Start: | Felskinn |
| End: | Mittelallalin |
| Stations: | 2 |
| Owner: | Saastal Bergbahnen AG (since 2016), Saas-Fee Bergbahnen AG (‥–2016, name change) |
| Operator: | Saastal Bergbahnen AG |
| Stock: | 2 for 115 passengers each |
| Linelength: | 1749m (5,738feet) |
| Electrification: | since opening |
| Elevation M: | 3456 |
| Website: | saas-fee.ch |
| Map State: | uncollapsed |
The Metro Alpin is an underground funicular situated above the Swiss town of Saas Fee, in the canton of Valais. Opened in 1984, it links the Felskinn cable-car station (29800NaN0 MSL) on the shore of the Fee Glacier to the Mittelallalin (3456m (11,339feet)) in the north flank of the Allalinhorn. The Felskinn–Mittelallalin Tunnel has a length of 1749m (5,738feet), with an altitude difference of 476m (1,562feet) between the two stations.
The Metro Alpin is the highest funicular in the world. Being a fully underground railway, it is also considered the highest subway in the world.