Core77 isn't an architecture blog by nature, but certain structures do catch our eye. So is the case with LEGO house, a 21,500+ sq ft building inspired by—you guessed it—everything LEGO. The center resides in Billund, Denmark and was was designed in partnership by Bjarke Ingels Group (BIG) and COWI. 

Image Credit: Iwan Baan

From the outside, the building is inconspicuously modern. However—exactly like a mullet hairstyle—it's all business in the front and party on the roof: 

Overhead view. Image Credit: Kim Christensen

Rooftop play areas. Image Credit: Iwan Baan

Inside, the first and second floors feature four public play zones color coded to represent a different aspect of a child's learning development—red is creative, yellow is emotional, green is social and blue is cognitive. In these spaces, guests of all ages are welcome to an immersive experience and encouraged to interact with other builders from around the world.

Image Credit: Iwan Baan

Image Credit: Iwan Baan

"LEGO house is a literal manifestation of the infinite possibilities of the LEGO brick. Through systematic creativity, children of all ages are empowered with the tools to create their own worlds and to inhabit them through play. At its finest—that is what architecture—and LEGO play —is all about: enabling people to imagine new worlds that are more exciting and expressive than the status quo, and to provide them with the skills to make them reality. This is what children do every day with LEGO bricks—and this is what we have done today at LEGO House with actual bricks, taking Billund a step closer towards becoming the Capital for Children." —Bjarke Ingels, Founding Partner, BIG.

Image Credit: Iwan Baan

Image Credit: Iwan Baan

The building also includes the Masterpiece Gallery, which displays impressive fan creations that play tribute to LEGO's diverse community of builders.

Image Credit: Iwan Baan

Inside The Vault, visitors are treated to a glance at the first edition of almost every LEGO set ever manufactured, which includes a new replica of the LEGO house itself. 

Image Credit: Iwan Baan

Image Credit: Iwan Baan

Yes, this building is straight up eye candy, but its mission to bring a community of builders together under one roof makes it so much more. 

Also, something I learned from this is that AFoL is the acronym for Adult Fans of LEGO. If you're an AFoL, we'd love to see the coolest thing you've built so far in the comments section.