A wonder

So I am purging my belongings currently. It has been necessary for a while, and now with life as is I have to fit it all back into my car like when I came out here. I have a tendency to hoard things with the idea that at some future point I will need that particular item. Although even considering my purge saddens me because I must part with some of my clothes. Usually people hold onto clothes they don't wear, but I can say that I wear them all. Not a pair of pants, shirt, blouse and especially not a dress or skirt gets left behind. My wish...for a bigger vehicle.

Of my papers I'd printed I found a list of the wonders of the world. I had done a search a time ago of the wonders of the world. But there are so many, ancient, modern, natural, Industrial.
What would you name? And why is there just 7, is the list always 7 because '7' is considered a lucky number. Even per history there are more than 7 splendid sites on the world. Here's just a few of the 'seven':


Pyramids of Giza: a gigantic stone structure near the ancient city of Memphis, serving as a tomb for the Egyptian Pharaoh Khufu

Colossus of Rhodes: a colossus of Helios the sun-god, erected by the Greeks

Lighthouse of Alexandria: a lighthouse built by the Ptolemies on the island of Pharos off the coast of their capital city

Statue of Zeus at Olympia: an enormous statue of the Greek father of gods, carved by the great sculptor Pheidias

Mausoleum of Mausssollos at Halicarnassus: a fascinating tomb constructed for King Maussollos, Persian satrap of Caria

Temple of Artemis at Ephesus: a beautiful temple in Asia Minor erected in honor of the Greek goddess of hunting and wild nature

Hanging Gardens of Babylon: a palace with legendary gardens built on the banks of the Euphrates river by King Nebuchadnezzar II

Stonehenge
Colosseum
Catacombs of Kom el Shoqafa
Great Wall of China
Porcelain Tower of Nanjing
Hagia Sophia
Leaning Tower of Pisa
Taj Mahal
Cairo Citadel
Ely Cathedral
Cluny Abbey

Great Wall of China-China
Petra-Jordan
Christ the Redeemer-Brazil
Machu Picchu-Peru
Chichen Itza- Mexico
Roman Colloseum-Italy
Taj Mahal-India
Great Pyramid- Egypt

New Seven Wonders:
Potala Palace-Lhasa, Tibet, China
Old City Jerusalem-Jerusalem, Israel
Polar ice caps- Polar regions
Papahanaumokuakea Marine National Monument-Hawaii
Internet- N/A
Maya ruins-Yucatan Peninsula, Mexico
Great migration of Serengeti and Masai Mara- Tanzania & Kenya
Grand Canyon-Arizona, US

Seven Natural Wonders:
Grand Canyon
Great Barrier Reef
Harbour of Rio de Janerio
Mount Everest
Aurora
Paricutin Volcano
Victoria Falls

Seven Wonders of the Underwater World:
Palau
Belize Barrier Reef
Great Barrier Reef
Deep-sea vents
Galapagos Islands
Lake Baikal
Northern Red Sea