Romantic fairytale treehouses with spiraling staircases and streamlined, modern stainless steel versions climb high into the sky.

As bicycles grow in popularity - especially in cities - bike storage solutions, from wall hooks to public racks, are getting more innovative and functional.

A specific type of soil bacteria could be used in conjunction with 3D printers to create inexpensive, low-waste materials with which to build electric towers.

Geysers have entranced observers from time immemorial with their sudden appearances, explosive power and the ability to conjure up rainbows on a cloudless day.

Choose cat litter, toys, beds, collars, food and other pet essentials that are not only healthier for your cat, but better for the environment.

A boomerang-shaped steel building hovers over an auto scrapyard in this futuristic design for a steel recycling research and education center in California.

Have you seen this island? The creators are searching for the lushly vegetated floating sculpture after it was cut free during a U.K. festival in July.