[detaro]

Long-term stays is going to be a lot harder than shorter visits. Need/option for such travel tends to be explicitly called out in job descriptions by scientific agencies/institutes running such things. If you're not at it from a scientific angle, expect it to be technician roles (and thus adjust year salary expectations accordingly)

[zerobrainwash]

What about short-term stays? Is it usually only as a visitor, or there might be volunteering opportunities?