Petra "a rose-red city":
Often described as the eighth wonder of the ancient world, is without a doubt Jordan’s most valuable treasure and greatest tourist attraction. It is a vast, unique city, carved into the sheer rock face by the Nabataeans, an industrious Arab people who settled here more than 2000 years ago, turning it into an important junction for the silk, spice and other trade routes that linked China, India and southern Arabia with Egypt, Syria, Greece and Rome.

History:
Petra was first established sometime around the 6th century BC, by the Nabataean Arabs, a nomadic tribe who settled in the area and laid the foundations of a commercial empire that extended into Syria.
Petra was the impressive capital of the Nabataean kingdom from around the 6th century BC. The kingdom was absorbed into the Roman Empire in AD 106 and the Romans continued to expand the city. An important center for trade and commerce, Petra continued to flourish until a catastrophic earthquake destroyed buildings and crippled vital water around AD 663.

Petra is sometimes called the ‘Lost City’. In spite of its being such an important city in antiquity, after the 14th century AD, Petra was completely lost to the western world. It was rediscovered in 1812 by the Swiss traveller, Johann Ludwig Burckhardt.
Description:

Entrance to the city is through the Siq, a narrow gorge, over 1km in length, which is flanked on either side by soaring, 80m high cliffs. Just walking through the Siq is an experience in itself. The colours and formations of the rocks are dazzling. As you reach the end of the Siq you will catch your first glimpse of Al-Khazneh (Treasury).

This is an awe-inspiring experience. A massive façade, 30m wide and 43m high, carved out of the sheer, dusky pink rock-face and dwarfing everything around it. It was carved in the early 1st century as the tomb of an important Nabataean king and represents the engineering genius of these ancient people.

The Treasury is merely the first of the many wonders that make up Petra. You will need at least four or five days to really explore everything there. As you enter the Petra valley you will be overwhelmed by the natural beauty of this place and its outstanding architectural achievements. There are hundreds of elaborate rock-cut tombs with intricate carvings - unlike the houses, which were destroyed mostly by earthquakes, the tombs were carved to last throughout the afterlife and 500 have survived, empty but bewitching as you file past their dark openings. Here also is a massive Nabataean-built, Roman-style theatre, which could seat 3,000 people. There are obelisks, temples, sacrificial altars and colonnaded streets, and high above, overlooking the valley, is the impressive Ad-Deir Monastery – a flight of 800 rock cut steps takes you there.
Within the site there are also two excellent museums; the Petra Archaeological Museum, and the Petra Nabataean Museum both of which represent finds from excavations in the Petra region and an insight into Petra's colorful past.
It is not permitted for motorized vehicles to enter the site. But if you don’t want to walk, you can hire a horse or a horse-drawn carriage to take you through the one kilometre Siq. For the elderly and/or handicapped, the Visitors' Centre, close to the entrance of the Siq, will issue a special permit (at an extra fee), for the carriage to go inside Petra to visit the main attractions. Once inside the site, you can hire a donkey, or for the more adventurous, a camel - both come with handlers and take designated routes throughout the site.

Although much has been written about Petra, nothing really prepares you for this amazing place. It has to be seen to be believed.