When striving for a cultural victory, you are going to want to be building as many wonders as you can to attract people to your empire as tourists. There are actually a lot of wonders that will provide bonuses that will help with your culture production as well, so where are the ones that are going to help you the most when it comes to pursuing this victory type.
Wonder: Bolshoi Theatre
Requires: Opera and Ballet
+2 Great Writer points per turn.
+2 Great Musician points per turn.
+1 Great Work of Writing slot.
+1 Great Work of Music slot.
Awards 2 randomly-chosen free civics when completed.
Must be built on flat land adjacent to a Theater Square district.
Wonder: Broadway
Requires: Mass Media
+3 Great Writer points per turn.
+3 Great Musician points per turn.
+1 Great Work of Writing slot.
+2 Great Work of Music slot.
Gain a free random Atomic Era civic boost
On flat land next to a theatre district
Wonder: Chichen Itza
Requires: Guilds
+2 Culture and +1 Production to all Rainforest Tiles for this city
Must be built on Rainforest
Wonder: Colosseum
Requires: Games and Recreation
+1 Culture
+1 Amenity
+1 Amenity and +1 Culture for all cities within 6 tiles.
Must be built on flat land adjacent to an Entertainment Complex district.
Wonder: Cristo Redentor
Requires: Mass Media
+4 Culture
Tourism output from Relics and Holy Cities is not diminished by other civilizations who have researched The Enlightenment civic.
Doubles Tourism output of Seaside Resorts across your civilization.
Must be built on Hills.
Wonder: Eiffel Tower
Requires: Steel
All tiles in your civilization gain +2 Appeal
Must be built on flat land adjacent to City Center.
Wonder: Estadio Do Maracanã
Requires: Professional Sports
+4 Culture
+2 Amenities in each city of your civilization
Wonder: Forbidden City
Requires: Printing
+5 Culture
Gain a permanent Wild Card policy slot
On flat land adjacent to city center
Wonder: Sydney Opera House
Requires: Cultural Heritage
+8 Culture
+5 Great Musician points per turn
+3 Great Works of Music slots
Must be built on coast adjacent to a Harbor. Cannot be built on a lake.
It's going to be almost guaranteed that you are not going to be able to build all of these obviously, since other civilizations will get at least a few of them build first. As long as your get a majority of them, and more total than any other civilization, you should be pretty good to steer towards that cultural victory condition.
Wonder: Bolshoi Theatre
Requires: Opera and Ballet
+2 Great Writer points per turn.
+2 Great Musician points per turn.
+1 Great Work of Writing slot.
+1 Great Work of Music slot.
Awards 2 randomly-chosen free civics when completed.
Must be built on flat land adjacent to a Theater Square district.
Wonder: Broadway
Requires: Mass Media
+3 Great Writer points per turn.
+3 Great Musician points per turn.
+1 Great Work of Writing slot.
+2 Great Work of Music slot.
Gain a free random Atomic Era civic boost
On flat land next to a theatre district
Wonder: Chichen Itza
Requires: Guilds
+2 Culture and +1 Production to all Rainforest Tiles for this city
Must be built on Rainforest
Wonder: Colosseum
Requires: Games and Recreation
+1 Culture
+1 Amenity
+1 Amenity and +1 Culture for all cities within 6 tiles.
Must be built on flat land adjacent to an Entertainment Complex district.
Wonder: Cristo Redentor
Requires: Mass Media
+4 Culture
Tourism output from Relics and Holy Cities is not diminished by other civilizations who have researched The Enlightenment civic.
Doubles Tourism output of Seaside Resorts across your civilization.
Must be built on Hills.
Wonder: Eiffel Tower
Requires: Steel
All tiles in your civilization gain +2 Appeal
Must be built on flat land adjacent to City Center.
Wonder: Estadio Do Maracanã
Requires: Professional Sports
+4 Culture
+2 Amenities in each city of your civilization
Wonder: Forbidden City
Requires: Printing
+5 Culture
Gain a permanent Wild Card policy slot
On flat land adjacent to city center
Wonder: Sydney Opera House
Requires: Cultural Heritage
+8 Culture
+5 Great Musician points per turn
+3 Great Works of Music slots
Must be built on coast adjacent to a Harbor. Cannot be built on a lake.
It's going to be almost guaranteed that you are not going to be able to build all of these obviously, since other civilizations will get at least a few of them build first. As long as your get a majority of them, and more total than any other civilization, you should be pretty good to steer towards that cultural victory condition.