Bitcoin garnered a lot of attention very fast during a 2013 court case. A man named Ross Ulbricht was on trial for creating and running an illegal online marketplace. Silk Road and other websites like it require a specific browser to use. None of the ones that come pre-installed (Internet Explorer, Chrome, Safari) will get you there.
After downloading the correct browser, you need the web address. Dark web URLs aren’t as easy to type in as amazon.com. These sites are usually a complex mixture of random letters and numbers. Typically, someone has to share the website with you to give you access. Further still, password protection exists on much of the dark web.