Question: Alpnachstad railway station is the lower terminus of the mountain railway in what country?

Context paragraphs:
Llanberis (SMR) railway station: Llanberis (SMR) railway station is the lower terminus of the Snowdon Mountain Railway, located in Llanberis, Gwynedd, Wales.

Matale railway station: Matale Railway Station is the terminus railway station on the Matale railway line of Sri Lanka.  It is the 65th railway station on the line from Colombo Fort railway station and is located in the Matale District in the Central Province.  It is 148.6 km from the Colombo Fort Railway Station and 27.64 km from the Kandy Railway Station. it's the end of railway line, because of water flowing beneath the ground, railway lines cannot be constructed beyond matale.

Pilatus Railway: The Pilatus Railway (German: "Pilatusbahn" , PB) is a mountain railway in Switzerland and is the steepest rack railway in the world, with a maximum gradient of 48% and an average gradient of 35%.  The line runs from Alpnachstad, on Lake Lucerne, to a terminus near the Esel summit of Pilatus at an altitude of 2073 m , which makes it the highest railway in Obwalden and the second highest in Central Switzerland after the Furka line.  At Alpnachstad, the Pilatus Railway connects with steamers on Lake Lucerne and with trains on the Brünigbahn line of Zentralbahn.

Ketti railway station: Ketti railway station is a railway station of the Nilgiri Mountain Railway in Ketti, a hill station town, in the Nilgiris district of Tamil Nadu.  It is a World Heritage Site and the popular Ooty passenger passes by the station.  It is administered by the Salem railway division of the Southern Railway zone.  The station code is:KXT.

Alpnachstad railway station: Alpnachstad is a Swiss railway station in the municipality of Alpnach in the canton of Obwalden.  It is on the Brünig line, owned by the Zentralbahn, that links Lucerne and Interlaken, and is also the lower terminus of the Pilatus Railway, a rack railway that ascends to the summit of Pilatus.

Capolago Lago railway station: Capolago Lago is an infrequently served railway station on the Monte Generoso railway, a rack railway that connects Capolago with the summit of Monte Generoso in the Swiss canton of Ticino.  The station is the lower terminus of the line, and provides interchange with ships of the Società Navigazione del Lago di Lugano at an immediately adjacent jetty on Lake Lugano.

Wellington railway station (Tamil Nadu): Wellington railway station is a railway station serving Wellington town, near Coonoor in the Indian state of Tamil Nadu.  The station is a part of the World Heritage Nilgiri Mountain Railway.  The station belongs to the Salem railway division and comes under the Southern Railway.  The station code is :WEL.

Brienz railway station: Brienz is a railway station in the village of Brienz in the Swiss canton of Bern.  Brienz is a stop on the Brünig line, owned by the Zentralbahn, that operates between Interlaken and Lucerne.  It is also the lower terminus of the Brienz–Rothorn rack railway (BRB) that climbs to the summit of the Brienzer Rothorn mountain.

Territet–Glion funicular railway: The Territet–Glion funicular railway (French: "Chemin de fer funiculaire Territet–Glion" ) is a funicular in Switzerland, which runs between the Territet and Glion suburbs of the town of Montreux.  At its upper terminus, the funicular connects with what was the lower terminus of the Chemin de fer Glion-Rochers-de-Naye (GN) mountain railway, which opened in 1892.  This later line was joined, in 1909, in an end on junction at Glion with the newly constructed Chemin de fer Montreux-Glion (MGl).

Laxey railway station: Laxey station is a station in the village of Laxey on the Isle of Man serving as an intermediate station on the Manx Electric Railway as well as being the lower terminus of the Snaefell Mountain Railway.

Supporting paragraphs: Alpnachstad railway station Pilatus Railway
Answer: Switzerland