Ngmdb.usgs.gov 

NYC – https://www1.nyc.gov/site/planning/data-maps/open-data/dwn-nyc-3d-model-download.page

https://www1.nyc.gov/site/planning/data-maps/maps-geography.page

 https://www.gosur.com/map/bangladesh/?ll=23.732222748311116,90.37967809758925&z=11.944416267455113&t=positron

A lot of countries/cities can find basic maps here: http://www.maphill.com/el-salvador/3d-maps/physical-map/

Air Quality Maps: https://www.iqair.com/th-en/el-salvador

basic maps:  https://www.worldometers.info/maps/el-salvador-maps/