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.

The U Bein Bridge stretching across Taungthaman Lake in Myanmar is a whoppin’ 1.2km long and was built way back in 1850. This old beauty used to be known as the longest teakwood bridge in the world, and it’s still one of the oldest bridges you’ll find anywhere. They built it when the capital of the Ava Kingdom moved to this area, and named it after the mayor who was in charge of the whole shebang. Get this, they used 1,086 pillars to hold it up, and some of ’em have been reinforced with concrete. Plus, they even used wood they salvaged from the old royal palace in the ancient city of Inwa.

This bridge is a vital path for the locals, and it became a tourist hot spot practically overnight after it was built. It’s also a big source of income for vendors and souvenir sellers, especially during July and August when Taungthaman Lake is at its highest and tons of tourists come flockin’ to see it.