The Miniatur Wunderland (German for "Miniature Wonderland") is according to Guinness World Records, the largest model railway system in the world. It is located at the historic Speicherstadt in Hamburg, Germany.

In December 2021 the railway consisted of 16,138 m (52,946 ft) of track in H0 scale, divided into nine sections: Harz mountains, the fictitious town of Knuffingen, the Alps and Austria, Hamburg, the United States, Scandinavia, Switzerland, a replica of Hamburg Airport, Italy and South America. Of the 7,000 m² (75,347 sq ft) of floorspace, the models occupies 1,545 m² (16,630 sq ft).

The exhibition includes around 1,120 digitally controlled trains with more than 10,000 wagons. The Wonderland is also designed with around 4,300 houses and bridges, more than 10,000 vehicles - of which around 350 drive independently on the installation - 52 airplanes and around 290,000 figures. In terms of lighting technology, the system has a recurring day-night cycle and almost 500,000 built-in LED lights. Planning is also in progress for the construction of sections for Central America and the Caribbean, Asia, England, Africa and The Netherlands.