  Motivated by recent detections of pulsar wind nebulae in very-high-energy
(VHE) gamma rays, a systematic search for VHE gamma-ray sources associated with
energetic pulsars was performed, using data obtained with the H.E.S.S. (High
Energy Stereoscopic System) instrument. The search for VHE gamma-ray sources
near the pulsar PSR J1718-3825 revealed the new VHE gamma-ray source HESS
J1718-385. We report on the results from the HESS data analysis of this source
and on possible associations with the pulsar and at other wavelengths. We
investigate the energy spectrum of HESS J1718-385 that shows a clear peak. This
is only the second time a VHE gamma-ray spectral maximum from a cosmic source
was observed, the first being the Vela X pulsar wind nebula.
