Some links for radio fun:
AM (LW/MW) stations around the world: https://www.mwlist.org/mwlist_quick_and_easy.php
Another site for US & Canadian AM stations: http://topazdesigns.com/ambc/
Shortwave broadcast schedules: https://www.short-wave.info/
NDBs in North America (sorted by frequency): http://www.dxinfocentre.com/ndb.htm
Numbers stations on HF: http://priyom.org/