These 14 buildings are full of hot air - literally - ranging from goofy inflatable pubs to awe-inspiring pneumatic pavilions and even inflatable insulation.

These 12 supremely stealthy structures speak softly of the need to belong, yet carry a big stick when it comes to representing their 'hood.

The stunning architecture of these 15 opera houses and auditoriums around the world is just as magnificent as the performances that take place inside.

Architecture shouldn't send you on a one-way-trip to snooze-ville. These designs prove that there are infinite ways to pack buildings with extra personality!

From iconic architecture like the fish-inspired Guggenheim Bilbao to obscure shell-shaped houses in Mexico, these 15 buildings are truly strange.

These 10 cool central bank buildings display their country's character while at the same time stating an impression of stability, power and wealth.

Not all military fortresses were boring boxes. Around the time cannons became popular, so did star-shaped forts designed to withstand the powerful weapons.

Everyone loves Lego, but these masterful sculptures prove that it's much more than just a toy. Here, the most famous buildings meet the world's favorite bricks.

"This building is out of order! You are not allowed to enter because you may DIE!" Welcome the mercury poisoned, abandoned Polam Philips factory in Poland.

The clubhouse is a child's private space and the source of much of their imaginative play. Here's a glimpse into the most intense backyards in the world.