Ads in London Underground Station Replaced With Cat Photos Dozens of advertisements were replaced with portraits of cats.

 -- Some London commuters came across an unexpected herd of cats -- the two-dimensional kind -- when they set off to work on Monday morning.

South London's Clapham Common tube station's ads were replaced with 68 different portraits of cats as part of the Citizens Advertising Takeover Service, or C.A.T.S., a project funded by a Kickstarter campaign.

The portraits feature felines in several shapes, sizes and colors. They will remain in the station for two weeks, according to Glimpse, the company that started the project. All of the cats featured are up for adoption.

In a Medium post, James Turner, the founder of Glimpse, explained that he and the team came up with the idea in February when they asked themselves to "imagine a world where friends and experiences were more valuable than stuff you can buy."

"The team began thinking about crowdfunding to replace Tube adverts with something else. ... We wanted this to become famous, so we needed something the internet would love," said Turner. "Frame it that way and the answer’s obvious. Cats."

Glimpse considers itself a "group of friends who want to use creativity for good," according to its website.

"This project has uncorked a kind of energy that I haven’t experienced before," Turner said.