15. Ariel Motor Company Factory (UK)

The Ariel Motor Company Factory in Somerset is among the world’s smallest car plants, turning out fewer than 100 vehicles each year.
Specializing in the iconic Atom and Nomad models, Ariel’s hands-on craftsmanship distinguishes it from larger, automated factories.
This personalized approach ensures each car is unique, appealing to true driving enthusiasts.
Source: Top Gear