What are some special facts such as the dates, why it was built or etc. of the new wonders of the world?

There have been many lists of modern wonders. Which list are you considering?

The new wonders:

Great Wall of China
Petra, Jordan
Christ Redeemer, Brazil
Chichen Itza, Mexico
Roman Colosseum, Italy
Taj Mahal, India
Machu Picchu, Peru

Here's a start:

http://www.travelchinaguide.com/china_great_wall/

http://visitjordan.com/Default.aspx?tabid=63

http://architecture.about.com/od/greatbuildings/ig/New-Wonders/Christ_the_Redeemer-lge2.htm

You can Google the other wonders.

The New Seven Wonders of the World are a collection of modern-day architectural marvels that have been recognized for their cultural and historical significance. Let's explore some special facts about each of them:

1. Great Wall of China: The Great Wall of China is a massive defensive structure built to protect the Chinese Empire from invasions. It was constructed over several centuries, with the most renowned sections built during the Ming Dynasty (1368-1644). The Great Wall stretches over 21,196 kilometers (13,171 miles) and is the longest man-made structure in the world.

2. Christ the Redeemer Statue: Located in Rio de Janeiro, Brazil, this iconic statue overlooks the city from atop Corcovado Mountain. It was completed in 1931 and stands at a height of 38 meters (125 feet), with its arms stretching 28 meters (92 feet) wide. The statue represents the importance of Christianity in Brazil and has become a symbol of Rio de Janeiro.

3. Machu Picchu: Dating back to the 15th century, Machu Picchu is an ancient Incan citadel located in the Andes Mountains of Peru. It was built as an estate for the Incan emperor Pachacuti and is renowned for its sophisticated stone architecture and mysterious abandonment. Machu Picchu remained hidden from the outside world until its rediscovery in 1911 by the American explorer Hiram Bingham.

4. Petra: Located in present-day Jordan, Petra is an ancient city carved into the rock face of a desert canyon. It was the capital of the ancient Nabatean civilization and flourished as a major trade hub from the 1st century BC to the 3rd century AD. The most famous structure in Petra is Al-Khazneh (The Treasury), which is intricately carved and served as a tomb for a Nabatean king.

5. Chichen Itza: Chichen Itza is an archaeological site in Mexico that was once a prominent Mayan city. The most notable structure within Chichen Itza is El Castillo (The Castle), also known as the Temple of Kukulcan. This pyramid is renowned for its architectural precision and the display of light and shadow during the equinoxes, where a snake-like shadow descends its staircase.

6. The Colosseum: Situated in Rome, Italy, the Colosseum is an ancient amphitheater that was completed in 80 AD. This grand structure could hold up to 50,000 spectators and hosted various public spectacles, including gladiatorial contests, animal hunts, and mock naval battles. It stands as a testament to the architectural achievements of the Roman Empire.

7. Taj Mahal: The Taj Mahal, located in Agra, India, is a mausoleum constructed by the Mughal emperor Shah Jahan in memory of his beloved wife, Mumtaz Mahal. Completed in 1653, it is renowned for its exquisite white marble, intricate carvings, and symmetrical design. The Taj Mahal is considered a masterpiece of Mughal architecture and is a UNESCO World Heritage site.

To find specific dates, detailed historical information, and more fascinating facts about each wonder, you can explore reputable sources such as books, documentaries, official websites, or visit these magnificent sites in person to experience their grandeur firsthand.