Apple:

With the release of iOS 15, Apple Maps gets its biggest update ever with a city experience that offers rich details, driving routes with better navigation, immersive walking directions shown in augmented reality, and much more. The update, which expands on the new map that Apple spent years building from the ground up, is now available in London, Los Angeles, New York City, and the San Francisco Bay Area, with more cities to come.

And:

Apple Maps introduces a new way to navigate cities with a visually stunning 3D map that offers unprecedented detail for neighborhoods, commercial districts, marinas, buildings, and more. Now users can see elevation details across a city, new road labels, and hundreds of custom-designed landmarks like Coit Tower in San Francisco, Dodger Stadium in LA, the Statue of Liberty in NYC, and the Royal Albert Hall in London, with more to come. A beautiful nighttime mode with a moonlit glow activates at dusk.

And:

Later this year, it will be available in Philadelphia, San Diego, and Washington, D.C. Support for additional cities, including Montreal, Toronto, and Vancouver, will be available next year.

Follow the headline link, scroll through the images to get a sense of what this looks like (at least to folks who can access it).