If you have a fear of heights, please have your medication handy while watching. Introducing the 20 most dangerous bridge tops in the world that will make your hands and feet tremble.

Royal Gorge Bridge (United States)

Located in Colorado, USA, the Royal Gorge Bridge boasts the world’s highest bungee jump at a staggering 321 meters. That’s a HUGE difference compared to Japan’s tallest Ryujin Suspension Bridge, which is only 100m! This bridge is also known as the world’s highest suspension bridge, sitting 350 meters above the riverbed. Sheesh!

Oh, and get this – you can ride a funicular down a super steep 45-degree slope from this bridge all the way to the riverbed. The funicular has 19 manual stop mechanisms, so safety’s covered. These things come in handy if something goes wrong. Tourist fare is 24 bucks.