Not all visa applications require you to visit an embassy, some are done online and visa issued via email to travelers. For jamaicans traveling on a Jamaican passport there are 23 country we can apply for visas online to visit 

Thailand

This visa is issued within 5-7 days online and is issued by the Royal Thai Embassy in Ottawa, Canada to Jamaicans traveling to Thailand. This visa grants you entry into Thailand for 60 days from time of entry

India

This visa is issued within 24-48 hours and grants the traveler entry into India for 30 Days from arrival.

Turkey

This visa is issued almost instantly and grants the traveler entry into turkey for up to 90 days

Indonesia

This application is also done online but must be done with an agency/guarantor in Indonesia as the application can only be submitted by an Indonesian citizen. This visa comes in many categories but a single entry tourist visa can take anywhere from 3-15 days to process and is also issued online