If you answer with New York, you're a basic bitch.

Purpee Oregon

Atlantis. It's so exclusive that nobody knows how to find it.

New York, NY USA

New Amsterdam

(because it became New York)

Clearly it's Best. That's why they named it that.

Clearly it's Best. That's why they named it that.

That's not what the OP asked. "Greatest" in what capacity, I dunno.

"Best" and "greatest" are synonyms. Also I couldn't find any city named "Greatest." 🤷‍♂️

Ecologically speaking, it must me Singapore.

Not quite. Greatest also means "largest" or "biggest" - whether that means most land area, most residents, biggest buildings, biggest crime rate, etc. is all up to context.

TL;DR: Seoul, Korea. I loved living there.

I've not seen many cities on Earth. But, in making my choices, I'll share what Im considering.

Caveat: I've never been to any place on the African continent. This is an admitted blind spot. I've also been to only three European cities.

Not New York, Toronto, San Fransisco, Ottawa, Portland, Las Vegas, Washington D.C., Miami, Québec, Atlanta, or Halifax (sorry Nova Scotia, we love you!)

Not London (UK). Not Frankfurt. Not Sydney (Aus). Not Beijing. Not Kathmandu. Not KL, KK, Bangkok, or Singapore. Not Dubai. Not Colombo, Male, Kuwait, Doha, or Muscat (sorry Oman, we love you!)

No La Habana, ni Santiago de Chile, Cali, Arequipa, Cusco, y no á ciudad de Guatemala (disculpame mis hermanos de Guate!)

I think that the greatest cities on Earth have DEEP histories, offer diversity, and have been at the crossroads of the human condition.

Of the cities I've spent at least a week in (in no particular order):

• La ciudad de México, México. (Pyramids, gardens, art, and food)

• Istanbul, Türkiye (Hagia Sofia, Bosphorus, history)

• Seoul, Korea (functionality, history, food, mountains, music)

• Cartagena, Colombia (music, seaside, fortress, art)

• Beirut, Lebanon [at least, when (2012) and how (with well-connected locals) I was there. Certainly, it's faced repeated harms in the past 7 years.]

• Berlin, Germany (architecture, functionality, history, walking tour, art, festivals)

• Montréal, Québec (one Canadian city needed to be on)

Ones I've not been to, but might list if I had:

• Tehran, Iran (history)

• Barcelona, Spain (Al-Analous)

• Mumbai, India

• Hong Kong

• Tokyo, Japan

Thank you for the in-depth answer.

NY.

Because Voldemort was a great wizard.

I want to say another city to be cool, but New York City, New York State always makes me proud. I live in Rochester lol.

New York, obviously, and fuck you

Even Old New York was once New Amsterdam. Why they changed it, I can't say. People just liked it better that way.

I’d love to go back to Cartagena. I proposed to my wife there and we had an absolutely amazing trip

This is the most authentic answer

I'm intrigued, please clarify what you mean by ecologically speaking?

Belgrade Serbia. It's the perfect size, not crowded but always busy, big enough that it has everything you could want small enough you can get anywhere in under an hour on free public transportation. The food is great and cheap and there's plenty of places open all night. Lots of green space and a couple huge parks. I live as a nomad but if i had to pick a city to settle in Beograd is the easy choice.

Been there. It's hard to pick a "greatest" city, but Singapore is definitely up there. Amazing place.

Depends a lot how you interpret "great". My personal favorites are, without picking a winner:
Singapore, Kuala Lumpur, Edinburgh, Brno

Canmore, Alberta. You're minutes from all the places that make up 90% of the Earth porn pictures on the internet, nestled right in the Rocky Mountains. Nobody is ever going to nuke, invade, occupy or otherwise come anywhere near Canmore during a war. Even if they did you could just escape into the vast Canadian wilderness which surrounds it. Lots of good food, shops, recreation and a generally great place to live and raise a family. Cheaper than Banff too!

Nobody said it had to be a major city.

Istanbul, although maybe not anymore since Erdogan is doing his best to ruin it.

The food is amazing, it (was) an open and tolerant city and its several thousand years of settlement mean there's fascinating history no matter where you look.

Bed-Stuy

QGTM!

And because fuck Old Amsterdam!

If you don’t mind being executed for smoking weed.

Mostly the G and the JMZ

Seattle WA is pretty cool.

Pyongyang, Democratic People's Republic of Korea.

They have the least authoritarian government and the most amount of food available for the non-elite class.

Los Angeles. In spite of all the anti-homeless initiatives, it's still the least wlrst place in the world for someone to be on the streets.

I really don't like cities, but the cities I have disliked the least (in order) are: Singapore, Istanbul, Rome, Paris, Tokyo, Quebec City, Granada Spain, New York, Montreal, Cartagena, Cuenca Ecuador, Washington D.C.(although it was many years ago I was there), Ottawa.

An affordable and walkable one, with every corner a third place and lots of trees.

Not Cheyenne, Wyoming. Go there. Walk the streets of its downtown. Walk those desolate streets and say to yourself, "this place is actually the capital of an entire state?"

Cheyenne, Wyoming, the town that God forgot.

Bielefeld, obviously.

I'll ask you kindly to reconsider those remarks

I like Seoul, but I liked Tokyo just a bit more. I recommend it if you get a chance. But like any city that big, your mileage may vary based on what you actually do and see.

I didn't live in Tokyo, but I did live near it for a little while. It was beautiful, but I'm a bit glad I wasn't in the city all the time. Just too much going on for my tempo.

Back off, Boston

Philadelphia, easy.

SO

take me back to Constantinople!

Oslo

HONK HONK HONK HONK HONK HONK HONK HONK

Thanks for including the "why" part of the answer.

https://en.wikipedia.org/wiki/Kastellorizo

The island's official name, Megisti (Μεγίστη) means "biggest" or "greatest".

Came here to say this :)

Yeah, yeah. Ya got your hockey and your Harvard. And some nice bridges and schools and hospitals.

Just be glad you’re not Philly. Lol

Cheyenne isn't that bad, especially compared to other Wyoming towns.

That doesnt exist. We mean a real city

Wakanda, easy.

No, you can't go back to Constantinople