How do I apply for a visa to visit South Korea?

It's hard to say. It depends on how skilled the countries' leaders are at diplomacy.

Yes, you can. However, please note that if you are missing your exit visa, you will likely be trapped there for some period of time. You could potentially be arrested...

No, you cannot go to North Korea without a tour guide. Generally, you’ll need a guide to travel through North Korea, but there are some exceptions.

The campus grounds are open all days of the week. However, you may not be able to get into any of the buildings or the merchandise store on the weekend.

You cannot go to a foreign country without a passport; a passport is necessary for international travel.

Most mosques have no problem with non-Muslims visiting as this allows them to learn about Islam and the local Muslim community. You can always call ahead or email the mosque.

Yes, mosques usually hold meals in the evenings, but double-check with the specific mosque since they aren't always held daily.

You could apply via the Saudi embassy in Stockholm, or through a travel agency.

You need to get a certificate from local mosque first saying you're Muslim, and rest of the process is the same.

Travel agencies such as AAA are able to assign you an international license.