.onion

.onion is a special kind of website address that you can only access using special software called Tor. It's used to help people stay anonymous online and keep their online activities private. Tor works by bouncing your internet traffic between several computers around the world, which makes it harder for anyone to figure out which computer is sending the traffic. A .onion website is like any other website, but it only works with Tor, so it's a good place to visit if you want to keep your identity and activities hidden from other people.