Where in the world is this?

Why not have a go at our new July monthly mystery travel picture competition? You could win three superb DK travel guides of your choice, worth up to £19.99 each. For this month it’s a scenic railway which dates back to 1898 and was originally constructed to help prospectors cross treacherous mountains to reach goldfields. It links a state and a territory between two countries and is a popular tourist attraction for cruise ship passengers. If you know the location, enter at mirror.co.uk/travel where you’ll find cryptic clues to help you.