It's not precisely a street, but you can now scale Yosemite's El Capitan rock wall in Google Street View. It appears that the big G also has ambitions on Uluru.
Street View has been all sorts of interesting places, from the Great Barrier Reef to the inside of the TARDIS. You can add "up a cliff wall" to that list from today, with Google making "street" view scaling of the El Capitan rock face. As Google's Tommy Caldwell explains, the effort involved creating two different sets of views to create the simulation of being there.
Speaking of being there, it appears that a famous landmark a lot closer to home might be getting the Google Street View treatment fairly soon as well. A Reddit user trekking around Uluru spotted Street View cameras taking shots of the big red rock recently, which suggests that virtual Uluru will soon be within reach too.