Bridges are one of the most important and oldest structures in the world. They come in a variety of styles from good old-fashioned rope and plank bridges, brick and mortar ones, and let’s not forget about the sturdy steel bridges that go on for miles. But in certain parts of the world, there are a few bridges with questionable designs, set up in equally questionable places that only the bravest of us would dare to walk across. Why don’t you take a look at these five petrifying bridges that will leave most people weak in the knees?

1. Hongyagu Bridge, China

Why does the Hongyagu Bridge in China feel like it was made specifically to induce fear in anyone who dares to cross it? Let’s see, it measures 1,601 feet and stands 722 feet in the air. Then there’s the glass floor so you don’t forget where you are or what you’re doing. And then the much-needed sound effects that make you feel like the glass is breaking beneath your feet with every step you take. The sway doesn’t help either. The good news is that there are workers stationed at points along the bridge to help you make it through.

2. The Royal Gorge Bridge, Colorado

Up until 2001, the Royal Gorge Bridge in Colorado used to hold the title of the world’s highest bridge, with a 1,000 feet vertical drop above the Arkansas River. The 1,260 ft long bridge took only six months to build with a budget of just $350,000 and has been standing there firmly since 1929. Because there’s no vertical truss to the bridge, it has a tendency to move about with the motion of a football, sending heartrates through the roof with every step of the way.

3. Q’eswachaka Bridge, Peru

Sitting on the Great Inca Road in the Andes is the Q’eswachaka Bridge which is said to not be for the faint of heart due to its loose and free-flowing nature. The entire bridge, including the handrails and floor, are made of braided natural fibers that are attached to stone pillars anchored into the ground. Given its fragile state, the bridge is replaced every year by local communities who begin work at their own end and meet in the middle. Three days later, everyone gathers together to celebrate the bridge’s completion.

4. Puente De Ojuela, Mexico

Just getting up to the bridge is quite the workout. But once you’re up there, you’ll probably regret your decision. The 1,000 feet long suspension bridge was originally built in 1898 in order to transport gold and silver from the local mine. Today, it’s mostly traversed by pedestrians, as well as witless yet brave tourists looking to get their adrenaline going. The bridge tends to sway back and forth quite a bit but once you’re on the other side, there’s a ghost town museum and abandoned mine waiting for you.

5. The Hanging Bridge of Ghasa, Nepal

The Hanging Bridge of Ghasa is another one that’s prone to swinging due to its location in the high altitudes, making it susceptible to strong winds. It also doesn’t help that the bridge is made out of ropes and planks, though it’s quite sturdy despite its fragile appearance. Humans aren’t the only ones who have to traverse this nightmarish bridge, the poor cattle have to as well, though they often have to be blindfolded in order to make it across. Can you blame them? You know you would be panicking too!