The seven wonders of world

 There have been several lists of the Seven Wonders of the World throughout history, but the most widely recognized list today is the "New Seven Wonders of the World," which was chosen in a global poll in 2007. Here are the seven wonders on that list:

Great Wall of China - The Great Wall of China is a series of fortifications built over 2,000 years ago to protect the northern borders of China from invasion. It stretches over 13,000 miles (21,000 kilometers) from the Shanhaiguan Pass on the east coast to the Gobi Desert in the west. The wall was built and rebuilt over many centuries, with the most famous and well-preserved sections constructed during the Ming Dynasty (1368-1644).

Petra - Petra is an ancient city located in present-day Jordan. It was once the capital of the Nabataean Kingdom, which was a wealthy trading empire that controlled the spice and incense routes between Arabia, Egypt, and Syria. However, the city eventually fell into decline and was abandoned by the 7th century. It remained largely unknown to the outside world until it was rediscovered by Swiss explorer Johann Ludwig Burckhardt in 1812.

The city is famous for its impressive architecture, including its rock-cut buildings and its use of water management systems. 

Christ the Redeemer - Christ the Redeemer is a large statue of Jesus Christ located in Rio de Janeiro, Brazil. It stands atop Corcovado Mountain, which is over 2,300 feet (700 meters) tall, and can be seen from many parts of the city.

The statue itself is 98 feet (30 meters) tall, and its arms stretch out 92 feet (28 meters) wide. It is made of reinforced concrete and soapstone, and was constructed between 1922 and 1931. The idea for the statue was first proposed by a group of Brazilians in the early 20th century as a way to promote national unity and faith.

Machu Picchu - Machu Picchu is an ancient Inca citadel located in the Andes Mountains of Peru. It is situated on a high ridge above the Urubamba River and was built in the 15th century during the reign of the Inca emperor Pachacuti.

Machu Picchu is widely regarded as one of the most spectacular architectural achievements of the ancient world. It was built using sophisticated techniques in engineering, mathematics, and astronomy, and is thought to have been an important center for religious and cultural activity.

The site was abandoned by the Incas in the 16th century and remained hidden from the outside world for centuries, until it was rediscovered by Hiram Bingham, an American explorer, in 1911. 

Chichen Itza - Chichen Itza is a large pre-Columbian archaeological site located in the Yucatan Peninsula, Mexico. It was one of the most important and powerful Mayan cities, and it flourished from around 600 AD to 1200 AD.

Chichen Itza is home to many impressive structures and buildings, including the Temple of Kukulkan, also known as El Castillo, which is a massive step pyramid that dominates the site. 

Other notable structures at Chichen Itza include the Great Ball Court, which is the largest ball court in Mesoamerica, and the Temple of the Warriors, which features rows of columns with carvings of warriors and animals.

Colosseum - The Colosseum, also known as the Flavian Amphitheatre, is a large oval amphitheater located in the center of Rome, Italy. It is considered one of the greatest engineering feats of the ancient Roman Empire and is one of the most iconic landmarks of Rome.

Construction of the Colosseum began in AD 72 and was completed in AD 80, during the reign of the Roman Emperor Vespasian. The Colosseum has a seating capacity of up to 80,000 spectators and features a complex system of tunnels and underground chambers used to transport animals, performers, and scenery. The Colosseum was damaged by earthquakes and plundered for building materials over the centuries, but it remains an iconic symbol of ancient Rome and attracts millions of tourists from around the world every year.

Taj Mahal -  The Taj Mahal is a white marble mausoleum located in the city of Agra, India. It was built by the Mughal emperor Shah Jahan in memory of his beloved wife Mumtaz Mahal, who died in 1631. Construction of the Taj Mahal began in 1632 and was

completed in 1653, employing over 20,000 workers.

The Taj Mahal is widely considered to be one of the greatest examples of Mughal architecture, a blend of Indian, Persian, and Islamic styles. Its most distinctive feature is its white marble dome, which is surrounded by four minarets. The interior of the Taj Mahal is decorated with intricate floral motifs and calligraphy.