The Shortwave Listening Post - Online Shortwave Radio Receiver
Online since 1995, this is a Drake R8 shortwave radio receiver you can control and listen to with your web brower.
Listen to AM radio frequencies online
There’s also SDRUtah.org, WebSDR.org, and KiwiSDR.org. Each has a slightly different interface and following; different bands, antennas, and geographic locations. You really can listen to the world on these.
Thanks for the coherent title.