I ran across Unurth and it was love. While most sites that show street art fail to even attempt to identify and credit the artists whose work they show, Unurth lets you go deep, linking to artists’ websites and collecting their work on individual pages. You can search by artist and location or just check out the index and get lost.
I couldn’t find the contact page quickly enough and Unurth’s Sebastian Buck wrote back quickly. Here’s what he had to say about his killer site, followed by some photos to give you a taste of what you can see at Unurth.

MN: How did the site get started?

SB: I got into street art in about 2001/2 because I saw lots of Banksy stencils around the southbank of London, where I lived, so I’ve always been on the lookout. Then when I moved to LA in 2007 I saw a lot of artists I’d never seen before it got me thinking about creating a site to unearth a lot of great street art from around the world. I eventually started it in 2008.

MN: Are you an artist?

SB: I’m not an artist; I grew up in a family steeped in photography, so that probably has something to do with it.

MN: Who sends the submissions in? Do you have contact with the artists?

SB: It started with photos I’d taken, and now it’s mostly images that the artists or photographers send me, or things I find online. Finding (or being sent) fresh stuff is really the joy of doing it – it’s all about the discovery.

MN: Most sites that feature street art don’t include the artists’ names. Hell, some books don’t even bother with that. Is giving credit to the artists important to you? What are your views about publishing artists’ work without crediting them?

SB: Yes, I’m determined to link to the artist for each post I do, wherever it’s possible. It’s obviously only right that the artists get credit, but also as a user, I want to be able to discover things and dig further on the things I like. When sites don’t link to the artists, you have to wonder what the motivation is.
To call someone out on it, and to illustrate the point: The Cool Hunter did a post called ‘Why Street Art Matters’, but didn’t give credit to the artist, photographer or group that organized the walls, and they didn’t respond to requests to remedy it (you can see the original work here). What’s the motivation? Sadly, the post is touting ‘a creative ideas agency’, and not real street art.

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Portrait, Mesa, Spain

1.A triple portrait by Mesa in Spain. See more by Mesa on Unurth.

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Mentalgassi for Troy Davis

2.The artist Mentalgassi painted this anti death penalty piece in London for Troy Davis in league with Amnesty International. You can see a video of the process on Unurth. The artist is a master of hidden faces and strange angles. Check out his website at mentalgassi.blogspot.com, and see more of his work on Unurth.

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Klone, Tel Aviv, Dog

3. A dog by Klone in Tel Aviv. More of Klone's work can be seen on Unurth and at the artist's website and Flickr page.

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4.This massive piece byInteresne Kazki in Shors, Ukraine can be seen on the artist's website. See more on Unurth.

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5.This one from Gaia in Miami can be seen on Unurth. See more Gaia on the artist's webpage and Flickr page.

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6.This piece from Buenos Aires is a dual effort called Castillo by artists Ever and Jaz.

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7.This work by JR covers the rooftops in Kibera, Kenya. You can see a video about the making of this huge undertaking on Unurth and visit JR's webpage at jr-art.net.

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8.This is one from Thingo Alvim in São Paolo, Brazil. See more Thingo Alvim on the artist's website and on Unurth.

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9.This Os Gêmeos piece appears in Grottaglie, Italy. The artists' website is just one of many places where you can see more, including Unurth.

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10.This optical illusion piece by Rub Kandy in Rome is called The Mirror. Rub Kandy's Flickr page shows a lot more geometric mind-benders.