Out of four recent proposals for a radical overhaul of Penn Station in New York City, this concept is far and away the most dramatic.

Skyscrapers shoot up in most cities, but what are developers to do in growing places where new building construction is limited to less than ten stories tall?

Major landmarks around the world, from the Sydney Opera House to the Lincoln Memorial, could have been dramatically different if these proposals were accepted.

Bio-reactors and micro-algae sound like the stuff of science fiction, but this is the real deal: biomass built into panel glass on an actual working structure.

The Mercedes-Benz Museum in Stuttgart, Germany hosts quite a spectacle when it demonstrates the awe-inspiring power of its tornado fire safety system.

Take a structure, strip away all of the non-essentials, and squeeze out every last unused bit of air space, and what do you get? Essentially, a flat-folded sheet.

These massive floating opera stages in Austria are so incredible, it'd be hard not to stare at them the whole time instead of watching the performances.

The already-aging White House had been retrofit with a maze of modern amenities like plumbing, electricity and heating - none of which were factored into the original plan.

From timeless architectural insights to new building technologies, watch these videos and you will never see built environments in the same way again.

Built for some of the world's most extreme weather conditions, the Halley VI Research Station in Antarctica is now open and ready for use.