All Estonian narrow-gauge railways were built at the gauge of . The TU2 pages Four museum lines and some industrial peat railways survive.
Railways Kunda cement factory, the first narrow-gauge railway in Estonia, built 1886. Pärnu–Mõisaküla–Valga line, , opened 1896. Tallinn–Lelle–Türi–Viljandi–Mõisaküla line. , opened in several stages between 1897 and 1900. Short branch line from Türi to Paide, , opened 1901. Valga–Mõniste–Ape–Alūksne–Gulbene line, opened in 1903. Liiva–Vääna, , part of Peter the Great's Naval Fortress' railway network around Tallinn. The line to Vääna was built in several stages in 1913. Paide–Tamsalu, , built during World War I as a military railway, opened to public passenger and freight traffic in 1918. Riisselja–Orajõe, , opened 1923. In 1928 extended to Ikla, on the border to Latvia (). In 1942 extension across the border to Ainazi, terminus of the gauge Valmiera supply railway. Lelle–Papiniidu (Pärnu), , opened 1928. branch from Viluvere to Vändra. Rapla–Virtsu, , opened 1931. Sonda–Mustvee line in northeastern Estonia, with several branches. Järvakandi glassworks, , industrial
Museums The Lavassaare railway museum houses a large collection of steam, diesel and electric locomotives with a gauge railway. There is a museum with a gauge, line in Avinurme which houses one locomotive and a collection of wagons. An underground museum with a short electric line is located in Kiviõli in the Northeast-Estonian industrial area. A former military railway line with a gauge is located on Naissaar island in the northern Estonia.
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