Awesome Interior Design

Peter Cohen’s house came with feral cats who got hurt because they stayed outdoors. So he made sure that the cats would want to stay inside. He built cat walkways, tunnels and even ventilated litter boxes. He now has 15 happy rescue cats.

Amsterdam’s Heldergroen looks like your typical boutique design shop during the work day, but at the close of business, all of the work surfaces fly up into the ceiling on steel cables, clearing the space so it can be used for after-work events.

Buster + Punch’s Electricity collection is a set of solid metal switches and dimmers. They’re made of steel, bronze, brass or aluminum and have monochrome or two-tone finishes. Available as single or double switches or dimmers.

TapPainter is an iPad app that virtually repaints walls. It accounts for the lighting conditions in your room and lets you try out different paint brands. There’s also a Kickstarter for an Android and iPhone version.

While not as impressive as the other transforming apartments we’ve seen, the residences in De Rotterdam show how we can make the most out of our homes through thoughtful planning and space-saving furniture.

Ad agency The Barbarian Group has 125 employees, and they all use the same desk. Made by Clive Wilkinson Architects, the Superdesk is an 1,100 foot-long, 4,400 sq.ft. surface that provides spaces to work and to hang out.

Träullit are modular soundproofing tiles made of wood, cement and water. They come in different shapes and colors and can be installed with magnets or glue. They also provide insulation and modulate humidity. Contact Baux to order.

Encourage your kids – or your inner child – to doodle with Burgerdoodles color-in wallpaper. It’ll take you a while to fill in the 394″ x 20.5″ sheet. Want to start from scratch? Check out these special paints instead.

Built by architecture firm Because We Can as part of a Mad Scientist-themed remodeling project for a client, the cat-tube runs across the room’s walls and has viewing ports and hidden access points.

We’ve seen a special paint that turns any surface into a dry erase board. Here’s one that turns them into chalkboards. The paint is scratch-resistant and can be easily cleaned. User video here.

Ruckstuhl’s Legno-Legno are rugs made of wood and polyurethane. They can still be rolled up, are easier to clean and have a neutral style that blends in with different interiors. Available in 5 colors.

Blinds with graphics that make double references to video games, featuring classic characters and icons made from controllers and handheld systems. Available in four designs and different colors.

This bathroom doesn’t have spiders or snakes in the toilet. What it does have is a clear glass floor revealing that you’re in an elevator shaft and that there’s nothing but a 15-floor drop beneath.

Designers Alrik Koudenburg and Joost van Bleiswijk set up this cardboard office space for ad agency Nothing. Clever construction bypassed the need to use screws or even glue to hold things together.

The El Ateneo Grand Splendid is a bookstore in Buenos Aires, Argentina. Built in 1919, the 21,000 sq.ft. theater was converted into a music and book shop in 2000.

You’ve probably seen pictures of this crazy room floating around the Web. Watch the video to see how graffiti artist Tilt and his friends created the split-personality Panic Room at Au Vieux Panier.