Red

The four Grand Slam tournaments (also referred to as the Majors) are especially popular: the Australian Open played on hard courts, the French Open played on red clay courts, Wimbledon played on grass courts, and the US Open also played on hard courts.

The yellow to red coloring of cheese is done through the addition of annatto (tropical tree seeds).

Mars is often referred to as the "Red Planet" because the reddish iron oxide prevalent on its surface gives it a reddish appearance that is distinctive among the astronomical bodies visible to the naked eye.

The city is known for its street life and cultural landmarks, as well as its red-light districts.

The world famed energy drink Red Bull was created in Bangkok by Chaleo Yoovidhya in 1976.

Watch the Changing of the Guard ceremony outside Buckingham Palace, take a cruise down the River Thames and view the city on foot or from the top of an iconic red bus.

Have you heard of "The red rose city" or Petra, Jordan?

It has this name because Petra was carved into the red-rose limestone of Wadi Musa .