Sveriges Järnvägsmuseum (the Swedish Railway Museum) holds one of the largest collections of historic railway rolling stock in Europe: more than 40 locomotives, 80 carriages and wagons, and thousands of smaller objects documenting 170 years of Swedish railway history. The museum occupies the old Gävle locomotive depot, a cavernous roundhouse dating from the 1870s.
The collection spans everything from early steam engines through electric locomotives of the mid-20th century to modern high-speed train interiors. The royal and diplomatic carriages are a highlight: several generations of lavishly fitted private wagons used by the Swedish royal family and government ministers. There are also hands-on sections aimed at children, a section on railway workers' daily lives, and good coverage of how the railways shaped Sweden's geography and industrial development. Allow at least two hours; railway enthusiasts will want considerably longer.