There was a recent worldwide internet-based contest to determine wonders of the modern world.  However, before going into current wonders, it would be worthwhile identifying and revisiting the 7 wonders of the ancient world¹ first.

• Great pyramid of Giza: The Great Pyramid (originally 481 ft high) is the oldest and only surviving ancient wonder of the world. It was built at Giza (the city of the dead), which is outside of modern-day Cairo, Egypt
• Hanging Gardens of Babylon: an elaborate complex of terraced gardens (about 400 ft wide by 400 ft long and 80 ft high) believed to have been built by the Babylonian ruler Nebucchadnezzar II for his wife Amytis as a reminder of her green, mountainous homeland.¹ The gardens were destroyed in an earthquake after the first century BC.²
• Statue of Zeus at Olympia: The statue (~40 ft high) was originally built at the temple of Zeus at Olympia on the west coast of modern Greece. It was eventually transported to Constantinople, where it was destroyed by fire in 462 AD.¹
• Temple of Artemis at Ephesus: Around 550 BC, this temple (260 ft by 430 ft with 127 columns) was built at Ephesus near the modern town of Izmir, Turkey to honor the Greek goddess of hunting. It was destroyed by an arsonist in 356 BC.¹
• Mausoleum at Helicarnassus: This was the magnificent burial place of King Mausollos of Caria. It was completed in 350 BC and stood at the city of Bodrum (Helicarnassus) on the Aegean Sea, in southwest Turkey. Crusaders, ie the  Knights of Malta, destroyed it in the early 15^th century.¹
• Colossus of Rhodes: The colossus was a huge bronze statue of the sun god Helios which according to legend was located at the entrance of Manraki harbor on the Greek island of Rhodes. From around 294 BC, the statue stood for about 6 decades, after which it was toppled by an earthquake.¹
• Lighthouse of Alexandria: At 384 ft high, this structure, built at the island of Pharos, now a headland within the city of Alexandria, Egypt, was considered the tallest building in the ancient world. Early fourteenth century earthquakes inflicted severe damage.  In 1480 AD, the Egyptian Mamelouk Sultan had his men use its stones to build a medieval fort on top of its ruins.¹