Man-Made Marvels: Palm Jumeirah

Our world is full of wonders great and small, ancient and contemporary, natural and man-made. Here are 15 modern marvels that fill us with awe through the sheer scale, beauty, backbreaking effort and inspiration that brought them into creation.

Palm Jumeirah is an artificial island, the first and smallest of the three Palm Islands created off the coast of Dubai, United Arab Emirates. The palm-tree shaped island is so large that it can be seen from the International Space Station. It is currently home to luxury homes and the megaresort Atlantis, The Palm, and will eventually tout many other deluxe hotels. In the years since construction began in 2001, this island effectively has doubled the length of Dubai’s coastline.

Man-Made Marvels: The Ledge at Willis Tower

Our world is full of wonders great and small, ancient and contemporary, natural and man-made. Here are 15 modern marvels that fill us with awe through the sheer scale, beauty, backbreaking effort and inspiration that brought them into creation.

Not afraid of heights? Check out the view from the Ledge at Willis Tower, formerly Sears Tower, in Chicago. The five-sided balconies, which opened in 2009, are suspended 1,353 feet in the air and jut out 4 feet from the building's 103rd floor Skydeck. They're actually more like boxes than balconies, with transparent walls, floor and ceiling. Visitors can see unobstructed views of Chicago from the building's west side, and a heart-stopping vista of the street and Chicago River below — if they're brave enough to look straight down.

Man-Made Marvels: Henderson Waves

Our world is full of wonders great and small, ancient and contemporary, natural and man-made. Here are 15 modern marvels that fill us with awe through the sheer scale, beauty, backbreaking effort and inspiration that brought them into creation.

At 12 stories high, Henderson Waves is Singapore's tallest pedestrian bridge. It snakes across Henderson Road, connecting Mount Faber Park and Telok Blangah Hill Park. The bridge, which opened in 2008, is made of seven undulating curved steel ribs that alternately rise over and under its deck. The curved ribs form alcoves that function as shelters with seats within.