Australia has opened a 19-kilometre hiking trail through the famous Blue Mountains in the forest region west of Sydney, connecting the famous Wentworth Falls with the towns of Leura and Katoomba where hikers can spend the night. Two days are needed to finish the entire Grand Cliff Top Walk, which cost 10 million Australian dollars (6.5 million US dollars) to complete, but people can also take shorter routes. Officials say it is a moderate walk suitable for most ages and fitness levels. “The Grand Cliff Top Walk provides visitors with a new, adventurous opportunity to connect with nature,” said…