You Do Need power plug adapter while traveling from Åland Islands to Uruguay.

Here is Why You Need An Adapter

The outlet and plug type used in Uruguay are C, F and L and in Åland Islands are C and F. This is how they look like.

Åland Islands

In Åland Islands, outlets of type C and F are in use.

Type C

Type F

Uruguay

In Uruguay, outlets of type C, F and L are in use.

Type C

Type F

Type L