Unique cars designs at Paris International Auto Festival

Opel Monza concept car is displayed at the concept cars exhibition at the 29th International Automobile Festival, in Paris, Wednesday, Jan. 29, 2014. The exhibition will open to the public Wednesday until Sunday Feb. 2. (AP Photo)

Peugeot's Onyx concept car is displayed during the concept cars exhibition. (AP Photo)

The BMW i3 compact concept. (AP Photo)

The Alfa Romeo 4C concept. (AP Photo)

Kia Provo ecrin. (AP Photo)

Renault citadine. (AP Photo)

The Alfa Romeo 4C. (AP Photo)