You Do Need power plug adapter while traveling from Faroe Islands to Costa Rica.

Here is Why You Need An Adapter

The outlet and plug type used in Costa Rica are A and B and in Faroe Islands are C, E, F and K. This is how they look like.

Faroe Islands

In Faroe Islands, outlets of type C, E, F and K are in use.

Type C

Type E

Type F

Type K

Costa Rica

In Costa Rica, outlets of type A and B are in use.

Type A

Type B