A ped is an abbreviation for pedestrian and x is for crossing. So you probably saw ped x which is pedestrian crossing.
Coober Pedy is a town in northern South Australia, 846 km north of Adelaide. So: the correct answer is that Coober Pedy is in the country of Australia, specifically the state of South Australia.
Coober Pedy is known for its opals.
The gemstone (rather than jewel) for which Coober Pedy is famous is opal.
Coober Pedy is a town, not a desert. The town of Coober Pedy lies within the Sturt Stony Desert/ Tirari Desert region.
Coober Pedy lies near the Sturt Highway.
Opal is mined at Coober Pedy in South Australia.
Coober Pedy in outback South Australia is known for its opals.
The airport code for Coober Pedy Airport is CPD.
The gemstone (rather than jewel) for which Coober Pedy is famous is opal.
One must travel west to go from Sydney to Coober Pedy.
English is the most widely spoken language in Coober Pedy.