Cracked bridge – Cracks on a newly opened glass walkway in Yuntaishan Scenic Park in China's Henan province have sparked concerns. The 260-meter cliffside passage, suspended over a canyon at 1,080 meters (3,540 feet) above sea level, opened about two weeks ago.
Glass bridge wave – It's one of a series of glass-bottomed attractions China has opened lately. Another new bridge (as seen in the picture), called Haohan Qiao or Brave Men's Bridge in English, is a 300-meter-long overpass in Shiniuzai National Park in southern China.
Transformation – Hovering 180 meters over ground, the Shiniuzhai's span was originally made of wood. It's been converted to a glass walkway over the past year.
Just in time – The Brave Men's Bridge (pictured), like the broken Yuntaishan walkway, opened just in time for Golden Week, the biggest week for tourism in China. It begins on October 1 -- China's National Day.
Opening soon – Also in Hunan Province, another glass-bottomed suspension bridge is planned for the Zhangjiajie Great Canyon area. When completed, the structure will be the world's highest and longest glass bridge.
Real life 'Pandora' – Hunan Province, home to striking quartz cliffs and scenery, is a popular tourist destination. Part of it is said to have inspired the creation of "Pandora" in James Cameron's "Avatar."
Eiffel Tower – A dizzying glass floor was installed in the Eiffel Tower in October 2014.
London's Tower Bridge – A glass floor installed high above London's Tower Bridge opened to the public in 2014. It created headlines shortly after when someone dropped a bottle, causing the upper layer of one of the glass panels to shatter.
Grand Canyon Skywalk – At the Grand Canyon, the Skywalk reaches out over a drop of 1,450 meters.
High up and windy – Chicago's Skydeck looks down from the 99th floor of the Willis Tower, attracting more than 1.5 million visitors each year.