  Black holes represent outstanding astrophysical laboratories to test the
strong gravity regime, since alternative theories of gravity may predict black
hole solutions whose may differ distinctly from those of General Relativity.
When higher curvature terms are included in the gravitational action as, for
instance, in the form of the Gauss-Bonnet term coupled to a scalar field,
scalarized black holes result. Here we discuss several types of scalarized
black holes and some of their properties.
