Nakhcheer or Chal-Nakhjir is a cave situated in Markazi Province of Iran. It is a limestone cave approximately 70 million years old.  It was discovered in 1989 and registered as a national monument in 2001. Its interior is made of crystals, dolomite sediments, stalactites and stalagmites.

Nakhcheer Cave in Markazi Province, Iran (Photo credit: IRNA)

Nakhcheer Cave in Markazi Province, Iran (Photo credit: MEHR)

Nakhcheer Cave in Markazi Province, Iran (Photo credit: IRNA)

Nakhcheer Cave in Markazi Province, Iran (Photo credit: IRNA)

More fascinating pictures: Payvand News of Iran | Photos: Nakhcheer cave