Ghana, particularly the markets, powder glass bead making and Kumasi brass bead and gold weight casting. Even less is known about the Ivory Coast and Nigerian brass bead casting that is usually more detailed than work from Ghana.

China:
Guangzhou bead market and Donguan area in Guangdong bead factories assuming you can make arrangements with their HK offices to get into the factories and workshops.

Yiwu and Zhuji areas in Zhejiang province for all the crystal bead and small item manufacturing and FW pearl industry. Xiamen, Fujian province for crystal factories. The drawn chevron cane factory in Boshan,Zibo,Shandong,China

The town north of Beijing that is known for dZi style production.

Philippines, Bali Indonesia, Jember, Java, Indonesia.

I envy your youth, Floor, and your drive. I've been many places but there are so many more I'd like to go to or return to but I know I can't see all of them. Thanks for sharing your travels with us!