What's the only Grand Slam tennis event still played on grass?

More Questions:

What is the topmost part of a column called?

On what part of your body would you wear mukluks?

What is Japanese sake made from?

What type of salad was invented by the owner of the Hollywood eatery the Brown Derby?

What do you ferment to make kombucha?

What is New Year's Eve called in Scotland?

Whose tombstone bears the inscription "Here Lies One Whose Name Was Writ in Water"?

What is Chicago's main international airport?

What is an uncastrated, adult male horse called?

Who sang the song "Beat It"?

How many Oscar nominations did the 2002 movie "Chicago" receive?

Queen provided the soundtrack to which 1980 space opera starring Max von Sydow and Brian Blessed?

Who was the second US President to appear on the face of a US coin?

When was the Emancipation Proclamation enacted?

What 2015 film broke over 40 box office records upon release?