ngmdb.usgs.gov - A government mapping website
OneEarth.com - maps of ecosystems and projects around the world
MapMaker.NationalGeographic.org - a mapmaker with data
GISGeography.com - downloadable maps and data
DigitalAtlasProject.net - downloadable maps
CIA.gov - the CIA keeps world and regional maps on its website
Note: If you would like to create your own maps, QGIS is recommended. QGIS is a GIS software that is somewhat similar to ArcGIS. It has a learning curve, but it is free. You can get QGIS at this website: https://qgis.org/en/site/. There is documentation on the website and there are tutorials for QGIS on YouTube.com.