The Taj Mahal is less famous than The Great Wall of China.

Taj Mahal-Great Wall

NA. (2015). Taj Mahal. Retrieved from: https://pixabay.com/es/india-taj-mahal-monumento-de-viaje-978482/
NA. (2013). Great Wall. Retrieved from: https://pixabay.com/es/pintura-art%C3%ADstica-china-220060/

A Mustang is less expensive than a Ferrari.

Mustang-Ferrari

NA.(2016). Mustang. Retrieved from: https://pixabay.com/es/mustang-coche-muscle-car-1703538/
Rotlek, J.. (2013). Ferrari. Retrieved from: https://pixabay.com/es/ferrari-brno-coche-de-carreras-298454/

The Smithsonian Institution in Washington is less interesting than Le Louvre Museum in Paris.

Institution-Louvre

NA. (2013). Institution. Retrieved from: https://pixabay.com/es/smithsonian-instituto-washington-67707/
Nugraha, E. (2013). Louvre. Retrieved from: https://pixabay.com/es/louvre-pir%C3%A1mide-par%C3%ADs-arquitectura-102840/