In Peter Jackson's film adaptation of "The Lord of the Rings",
Orodruin was represented by two active volcanoes in New Zealand:
Mount Ngauruhoe and Mount Ruapehu.
cf. http://en.wikipedia.org/wiki/Mount_Doom

On 7th of August 2012 Mount Tongariro volcano erupted
for the first time in nearly a century, leaving a large area
of New Zealand’s North Island under a huge ash cloud.