Young field of terahertz science and technology experiences need in new materials and devices. Metamaterials based on structured graphene (a one-atom thick material with exceptional physical properties such as high electrical conductivity, optical transparency, tunability by electrochemical potential), provide wide possibilities for terahertz light manipulation. In this talk I will discuss examples of graphene metamaterials applications for terahertz hyperlens and tunable absorber. Moreover, I will give an overview of the research activities in the Metamaterials group at DTU Fotonik, Technical University of Denmark