As with the Burning Man doodle, there's often an air of mystery as to what is being depicted.

WSJ: A Holiday Card From Google

At the Bergdorf branch, when we visited, we found much mauve velvet, a sepulchral hush and an air of mystery--but no customers.

FORBES: The Cult Of JAR

Oftentimes fog descends like a veil to obscure the view, but rather than detract from its allure, the mist lends the scene an air of mystery akin to that of a Scottish loch.

BBC: The adventure playground of the Azores

On top of that, the birds (like Garbo) project an air of mystery: They spend only a few months near land each year, then head back out to sea, scientists know not where.

FORBES: Chick Flick

Cultivate an air of mystery.

WSJ: Jason Gay: 29 Rules for College Graduates

Mystery continued to swirl around an Israeli air strike in Syria that took place in the middle of the night on September 6th.

NPR: Mystery Surrounds Israeli Strike in Syria

"The final commands and last words of the pilots, which usually play a crucial role in establishing the reasons for an air disaster, remain a mystery, " says the paper.

BBC: Ukrainian, Russian papers assess plane crashes