Ranging from renovated missile silos to stunning modern homes built into hillsides, these 12 underground lairs are ideal for villainous activities.

Fun and unexpected features like slides, pirate ship forts, indoor skate parks, tree houses and trap doors turn these 13 homes into private playgrounds.

From small and kid-friendly to rugged and challenging, these 12 indoor climbing walls turn living rooms, bedrooms and more into scalable surfaces.

An incredible tentacle-like mirrored steel slide swirls and twists through four stories of a bright white, modern penthouse in Manhattan.

These twelve homes balance Japanese traditions like recessed lower levels, adaptable interior rooms and transitional garden spaces with modern sensibilities.

Another contender for the first 3D printed house, 'ProtoHouse 2.0' looks like a spider's nest and can be assembled without screws or welding in a single day.

Animal House reboot anyone? This unlucky group of 13 zoomorphic buildings make being sent to the doghouse (cathouse, etc.) a decidedly different experience.

Suppose Design Office specializes in bright, spacious-feeling interiors that incorporate courtyards, indoor gardens and huge windows, even on very small lots.

Tiny houses are growing in popularity because of increasing environmental consciousness and a desire to reject unnecessary material goods.

We all know architects who dabble in different design disciplines, but what happens when you task international icons like MVRDV and Toyo Ito with creating dog architecture?