During Run 1 and 2 of the LHC, the LHCb experiment collected the world's largest sample of heavy flavour decays. The precise tracking and particle identification capability of the
experiment, together with the large dataset collected, allow to study the properties of heavy hadrons with unprecedented precision. In these proceedings three recent results are discussed: the observation of two new excited $\Lambda^0_b$ baryons, the search for the $\Xi_{cc}^+$ baryon and the observation of a candidate for the $^3D_3$ state of the charmonium system.