A mission to discover and re-create unexcavated worlds still hidden beneath the earth.　　Episodes include…　　S1E1 Fortress of the Knights Templar　　S1E2 Ghost City of the Pacific　　S1E3 El Dorado City of Gold　　S1E4 Stonehenge　　S1E5 Petra's Hidden Origins　　S1E6 Inca Island in the Sky