Structures Buildings... Cool2

Sure, the Brooklyn Bridge and Golden Gate Bridge may be quite stately, but they are sadly lacking any fire-breathing dragons. Now Vietnam has opened what is arguably the most awesome bridge in the world.

Rising out above the confluence of two rivers, the Alcazar of Segovia, Spain is distinctively shaped like the bow of a ship.

'Spiderman' Alain Robert scaled the Burj Khalifa in Dubai, moving methodically and swiftly along the metal facade, and waving triumphantly at the top six hours later.

The Cayan Tower twists a full 90 degrees from its base to its apex. Designing a 1,000-foot-tall twisting tower is no small feat. Many similarly torqued completed projects cap out at fewer than 50 stories.

Think of a library-sized greenhouse with racks of cascading vegetables instead of books. Though challenging to implement, vertical farming's small footprint gives it an advantage over other forms of urban horticulture.

The Great Pyramid is part of Egypt's rich heritage. Constructed some 4,500 years ago, this colossal structure was the tallest in the world for thousands of years.

Its simple yet contemporary design creates a stunning effect. It combines two intersecting arcs and a square prism – and this makes the building more efficient.

Look up and up and up! From a particular spot, the Hancock Tower looks two-dimensional -- like a completely flat pane of glass, with no depth, against the sky.

The Willis Tower in Chicago offers a vertigo worthy view of the cityscape, with glass ledges protruding outward from the 103rd floor.

Walking downwards from the top through a continuous spiral promenade, the visitors of the observation tower experience all of the building’s programs in a constant motion, enjoying dynamic 360 degree views.