Ambarawa Railway Museum, Railway museum in Ambarawa, Indonesia

The Ambarawa Railway Museum occupies the former Willem I station, a large gabled building with grey corrugated roofing, horizontal grey panels and dark louvres under the ridge, and a white sign reading "AMBA RAWA" with "1873-401" beneath. A red-and-white scalloped valance spans the entrance canopy. The station is an island building with a 21.75-metre roof span, larger than those at Kedungjati and Purwosari, and its two sides were built for different track gauges.

The station opened on 21 May 1873 as Willem I, built by the Nederlandsch-Indische Spoorweg Maatschappij to move KNIL troops between Semarang and Fort Willem I. A rack line to Secang, finished on 1 February 1905, linked it to Magelang. The line beyond Bedono closed in the early 1970s after earthquake damage, and on 8 April 1976 Governor Soepardjo Rustam converted the station into a museum.

The original Willem I station building now houses restored locomotives that recall a time when cog railways carried troops and goods through the Central Javan hills. Visitors can walk through the open carriage halls and inspect the engineering details of each machine up close.

The museum opens daily and charges admission, with different rates for Indonesian and international visitors. Many exhibits stand outdoors on the tracks, so comfortable footwear for walking on gravel is advisable.

Visitors can take rides on the Ambarawa-Bedono route on selected days, which operates as the only functioning steam cog railway in Indonesia. This route winds through rice paddies and small villages, with the distinctive clatter of the cog mechanism audible throughout.