- Visitors to Shanghai's 340-meter-high Skywalk held only by safety harness
- Dachstein Stairway to Nothingness in Austria straddles a drop of 1,300 feet
(CNN)Think you can handle a 340-meter-high, open-air glass walkway?
How about one with no guard rail?
Shanghai Skywalk, which was unveiled in July 2016, is the latest daredevil challenge for fear-free travelers.
It joins an adrenaline-inducing roll call of platforms around the world offering spectacular views.
1. Shanghai Skywalk (China)
At Shanghai's 88-story Jin Mao Tower, visitors will be able to walk around a new glass walkway on the outside of the building, 340 meters above the city.
The 1.2-meter-wide platform has no fence and no guard rails; only a safety harness stands between you and oblivion.
Tickets aren't yet on general sale -- and there's no confirmation when they will be -- but when CNN visited Shanghai for travel series "In 24 Hours," host James Williams just had to try it out.
Jin Mao Tower; 88 Century Ave, LuJiaZui, Pudong Xinqu, China; 200120
2. Brighton i360 (UK)
The world's tallest moving observation tower, the 162-meter British Airways i360, opened in Brighton, England in August 2016.
It's also the world's slimmest, with a height to width ration of more than 40:1.
Visitors glide to the top in a futuristic glass-and-steel pod, enjoying 360-degree views over the seaside town and the English Channel.
It was designed by London firm Marks Barfield Architects, the same team behind the London Eye.
3. SkySlide at Skyspace LA (United States)
Since June 2016, visitors to the new OUE SkySpace LA observation deck atop Los Angeles' US Bank Tower have been able to coast down the SkySlide, a glass chute affixed to the outside of the building, going from the 70th floor to the 69th.
The 45-foot-long, 1.25-inch-thick tube hovers 1,000 feet above the sidewalks below.
The glass is made to withstand hurricane-force winds of up to 110 miles per hour and is held together by steel outriggers.
OUE SkySpace; 633 West Fifth Street, Suite 840, Los Angeles, CA 90071; +213 894 9000; admission $25 for adults
4. Dachstein Stairway to Nothingness (Austria)
Visitors to Dachstein's Stairway to Nothingness must first cross Austria's highest bridge, the 100-meter-long Dachstein suspension bridge which straddles a drop of 396 meters.
They then face 14 steps that descend from the cliff face and which are surrounded by glass walls.
The entire structure took six months to build and was created by an engineering firm specializing in high-altitude construction.
And if you've not had enough of incredible sights, the nearby glass-bottomed Dachstein Glacier Skywalk offers views as far as the Triglav mountains of Slovenia and the forests of the Czech Republic.
Dachstein Glacier Skywalk, Dachstein Glacier, Ramsau am Dachstein, Austria; +43 22042 800; admission: free
Dachstein Stairway to Nothingness, Dachstein Glacier, Austria; +43 0 3687/22042; admission $11 for adults
5. Tokyo Skytree observation decks (Japan)
The Tokyo Skytree is Japan's tallest structure, with a height of 2,080 feet (634 meters).
It has two observation decks. The lower one is located at 1,148 feet (350 meters) and has a section of glass flooring.
The upper one, which has floor-to-ceiling windows and 360-degree-views of the city, has a height of 1,476 feet (450 meters).
On a clear day, Mount Fuji can be seen from the observation decks.
Tokyo Skytree, 1-1-2, Oshiage, Sumida, Tokyo; +81 (0)3 3623 0634; admission from $10 for adults
6. Kinzua Skywalk (United States)
When the Kinzua Viaduct was built in Pennsylvania in 1882, it was the longest and highest viaduct in the world.
In 1900 it was rebuilt to carry heavier trains, using 3,175 tons of steel and 895,000 rivets.
In 2003, a tornado destroyed 11 of the 20 towers and it was decided that the remaining towers would be used to support the Skywalk.
The Skywalk extends 624 feet (190 meters) into the Kinzua Gorge and glass panels allow visitors to peer into the gorge below.
Kinzua Skywalk, 1721 Lindholm Drive, Mt. Jewett, Pennsylvania; +1 814 965 2646; admission: free
7. AlpspiX viewing platform (Germany)
At the base of Germany's Alpspitze mountain, the AlpspiX viewing platform comprises two steel beams, both of which measure 79 feet (24 meters) in length.
Visitors brave enough to walk to the end of the glass-walled platforms can look 3,281 feet (1,000 meters) down into the valley.
The platform remains open in winter, when the grid flooring allows snow and ice to pass through.
AlpspiX viewing platform, Zugspitze, Garmisch-Partenkirchen, Germany; admission: free
8. EdgeWalk CN Tower (Canada)
Located on the roof of the CN Tower's restaurant at a height of 1,168 feet (356 meters), the EdgeWalk allows visitors to slip into climbing harnesses and walk around the edge of Canada's tallest structure.
There's also a glass floor 1,122 feet (342 meters) above ground level, and although the glass is only 2.5 inches thick, it's reportedly strong enough to hold 14 hippos -- if they could fit in the elevator.
The EdgeWalk holds the world record for world's highest external walk attached to a building. CN Tower also has a glass-floored observation deck and outdoor SkyTerrace.
EdgeWalk, CN Tower, 301 Front St. W., Toronto; +1 416 601 3833; EdgeWalk Experience costs $145 (CAD $195)
9. The Ledge (United States)
The four boxes that make up The Ledge experience in Willis Tower, Chicago, are made from half-ton panels of glass. The walls consist of three layers, each half an inch thick.
Visitors who step into one of the boxes can see for 50 miles across four states, as well as 1,353 feet (412 meters) to the street below.
It's a popular site for wedding proposals -- as if popping the question wasn't scary enough -- and visitors can even get married in them.
The boxes retract into the building when the windows need cleaning.
The Ledge, Willis Tower, 233 S. Wacker Drive, Chicago; +1 312 875 0066; admission $22 for adults
10. Cliffwalk (Canada)
The Cliffwalk is a 700-feet (213 meter) walkway attached to a granite cliff face above the Capilano River in British Columbia, Canada. The highest point is 300 feet (90 meters) above the river.
To attach the Cliffwalk, 16 anchor points were drilled 19 feet (six meters) into the rock face using 1,825 bolts, and 40 tons of steel were used.
The Cliffwalk also features two glass panels that have an anti-skid finish and were shipped over from Austria.
Cliffwalk, Capilano Suspension Bridge Park, 3735 Capilano Road, North Vancouver, British Columbia; +1 604 985 7474; admission $30 (CAD $39.95)
11. The View from The Shard (England)
London's The Shard is the tallest building in Western Europe and The View From The Shard is located on floors 68, 69 and 72.
The best panoramas are from floor 72, at a height of 800 feet (244 meters).
This open-air observation deck offers 360-degree views of the city.
Visitors can also look up into the "shards" of glass that form the top of the skyscraper.
The View from The Shard, 96 Tooley St., London; +44 0844 499 7111; admission from $32 for adults (advance tickets)
12. Stegastein lookout (Norway)
The glass panel at the end of this walkway gives visitors the impression they could simply fall off the end.
Commissioned by the Norwegian Highway Department as part of a project to improve the appearance of the country's tourist routes, the lookout allows visitors to look straight down into the Aurlandsfjord, 2,000 feet (609 meters) below.
Stegastein lookout, Aurland-Laerdal Road, Aurland, Norway; +47 57 631400; admission is free, but the easiest way to access it is by a sightseeing tour from Flam ($34)
13. Top of Tyrol Stubai Glacier (Austria)
The Top of Tyrol viewing platform in Austria was completed in 2008 and provides visitors with spectacular views over 103 peaks.
All of the parts -- including 19 tons of steel and a 164-foot (50-meter) hand rail were lowered into place by helicopter.
It's 10,433 feet (3,180 meters) above sea level and 50-foot (15-meter) rock anchors keep the structure in place.
Top of Tyrol, Stubai Glacier, Austria; admission free
14. Matteo Thun's Viewing Platform (Italy)
The best views of Italy's Merano region are from this binocular-shaped viewing platform, high above the gardens' huge oak forest.
The viewing platform is just one of several within the gardens, which in 2005 were named Italy's most beautiful gardens.
The platform is suspended over the Gardens of Trauttmansdorff and was designed by architect Matteo Thun.
Matteo Thun's Viewing Platform, Gardens of Trauttmansdorff, Via San Valentino, 51/a, 39012 Merano Bolzano, Italy; +39 0473 255600; admission $13.30 for adults
15. Grand Canyon Skywalk (United States)
This steel and glass, horseshoe-shaped walkway extends 70 feet (21 meters) over the lip of the Grand Canyon, almost one mile above the valley floor.
The 90 tons of glass were imported from Germany. The Skywalk, which is bolted to the canyon's rim, can support the weight of 70 747 passenger jets.
Apollo astronaut and the second person to set foot on the Moon, Buzz Aldrin was the first person to step onto the Skywalk, which cost $30 million to build.
Grand Canyon Skywalk, 5001 Buck n Doe Road. Grand Canyon West, Arizona; +1 888 868 WEST; Gold package admission, including Skywalk, from $71.38
•This story originally published in September 2013. It was updated and revised in November 2016.