You go up this air tower, which is 95 feet above the ground.

BBC: Imperial War Museum North

Hopping out of the taxi at the Starbucks there after an amazingly quicker ride than normal in the still relatively empty streets, I took up elevator up Tower A to go see Feng Deng, who heads NLVC.

FORBES: Hanging out with VCs at Tsinghua

Coit Tower is a beloved part of the San Francisco skyline, and is not free to go up.

BBC: Twenty-five free attractions in San Francisco