I’m not sure if you saw the recent Yahoo Travel “10 Best Places to Explore the Underworld.”
They were very cool places and if you are a dedicated traveler, some (if not all) seem to be great places to visit.
However, I’m baffled as to why the Paris Catacombs were not included.
The underground “city” of Seattle was included. The subterranean system of the Fremantle, Australia prison was touted. The Colosseum Hypgeum (basically, the “basement” of the Rome Colosseum) where the gladiators and animals waited before ascending to the arena is included. Read More Why Didn’t They Include the Paris Catacombs?