Google announced on Thursday that 3D imaging is now available on the latest version of the Google Earth app for the new iPad, iPad 2, iPod touch and iPhone 4S.

"With today's release of Google Earth for iOS you can literally fly through breathtaking 3D city landscapes and images and follow virtual tours of places you’ve never been — all with a simple swipe of your fingertip," Peter Birch, Google Earth product manager, wrote in a blog post.

Birch highlights Tour Guide in the blog post, writing that it lets mobile users browse through thumbnails to explore any city or landmark. Some of the photos are user generated and uploaded to Picasa or Panoramio.

Currently, you can browse through Boulder, Boston, Charlotte, Lawrence (Kan.), Long Beach (Calif.), Los Angeles, Portland (Ore.), San Diego, Santa Cruz, Tampa, Tucson, and the San Francisco Bay Area (including the Peninsula and East Bay) as well as Rome, Italy. Birch writes that the team is adding new 3D locations "as fast as we can."

By the end of 2012, Google aims to have photo tours of metropolitan areas with a combined population of 300 million people or more.

The app is now live on iTunes.

What do you think of the 3D images on the app? Tell us in the comments.