I know that you can get the same pictures from the internet but building something like this and seeing how all the pieces fit together is extremely cool.

Also an extremely cool project to do with kids, the output is visual but it's such a cool combination of hardware, software, some light math (to design the attena) and crafting (to build it).

I don't know if there are any others. I do remember picking it up with a suitably-programmed VHF receiver in the early 2000s with a distinct "tick - tock - tick - tock" sync pulse on every line.