D is for…

A few questions where all the answers begin with ‘D’. As you know the starting letter, there are no multiple-choice options.

1. What is the pictured US National Monument, and in which US state is it located?
2. The spiritual leader of the Tibetan people is known by what title?
3. What is defined in the Oxford English Dictionary as a ‘country house or cottage in Russia, typically used as a second or holiday home’?
4. Marvin the Paranoid Android was originally created for a radio series by which science fiction writer?
5. A Scottish driver won 13 Formula One Grands Prix across his 15-season career, which began in 1994. Despite this, he didn’t secure the World Drivers’ Championship, although he came in second place in 2001. Can you identify him?

Good luck! I will post the answers later today.