Most of that aren't impressive to other examples.
Maybe here’s a better perspective of what they could do, and why I think they are significant.
Florence Cathedral - Late Medieval
A great Italian counterpoint to gothic architecture, only rivaled by St. Peter’s in Rome. It is has the tallest purely masonry dome in the world.
Must be built next to mountains and a holy site with a religious building. Potentially, it could be an early boost to the tourism game, by maybe granting a few relics and appropriate slots.
San Marco’s Square (Venice) - Late Medieval
Not just the square, but St. Mark’s Bascillica, the Doge’s Palace, the tower, and the surrounding structure. Napoleon used it as his palace during his Italian campaign.
Must be built on the coast next to a commercial hub. Venice was not just the most powerful naval presence in the Middle Ages, but also the hub of all commerce in Southern Europe. I’d recommend something like you get 250-500 gold every time you send an envoy.
Empire State Building - Early Modern
Arguably just as iconic as Broadway or the Statue of Liberty. Tallest building in the world for 40 years in an age of skyscrapers. It defined what a skyscraper could aspire to be.
Must be built adjacent to city center on flat land. All world wonders grant 25 tourism.
Burj Khalifa - Late Information
Not just the current tallest building in the world, but the tallest by a huge margin (until Kingdom Tower is completed at least). This should be included for similar reasons to Estadio Maracana. A new, culturally relevant wonder, and would represent the modern UAE without needing to add a new civ.
Must be built in a desert tile next to a city center. Immediately wins a culture victory.
Araj Al Bait - Late Information
Modern representation of Mecca. It’s the ultimate example of religious tourism, with no real comparable example on Earth.
Immediately wins a religious victory.
The Motherland Calls (Volovograd) - Early Atomic
This 90-meter statue just looks awesome. I think of this is like the Soviet equivalent of the Statue of Liberty, meant to inspire nationalistic pride.
Must be built on a hill next to a military academy. Nearby cities never suffer loyalty issues, and all combat units immediately gain 1 promotion.
Arc D’Triomphe - Late Modern
No better modern symbol of victory in war. Immediately recognizable by most of the western world.
Favorable peace deals may immediately push you into a golden age and for the rest of the game you earn double era score.
Tesla Gigiafactory - Late Information
The biggest factory in the world? Why not!
Must be built next to a power plant and a research center. All cities in your empire have production equal to the highest production city in your empire.
Cape Canaveral Launch Platform - Late Atomic
Not just here for its historical utility, but for what it conjures in the imagination for the space race.
Must be built on the coast. Functions as a spaceport.
All space projects take one turn to complete.
Disneyland - Late Atomic
Arguably the invention of the must-see attraction. It may not have the most attendance in the world anymore, but it spurred the genre.
No build restrictions. All countries act as if they have granted you open borders and trade routes for the purposes of tourism multipliers.
Neuschwantein Castle - Industrial
I liked the functionality in V. Must be built on a mountain. All cities with walls grant bonus tourism and gold.