The following keywords are very broadly related to geography.
airline codes
airline travel
airplane call signs
airplane tail art
airport codes
antipodes
archipelagos
area codes
Atlantic City
aviation
beaches
Bluebikes
blueprints
Blue Riband
Brazil
bridges
British Columbia
Broadway theaters
buses
capitals of states or countries
cities
city address grids
city and state names
city name changes
coats of arms
col (saddle point between mountains)
Commonwealth Avenue Mall
counties
countries
country codes (any variety)
crosswords on the landscape
cruise lines
demonyms
Eiffel Tower
electoral college
embassies
explorers
famous trips
federal congressional districts
Federal Reserve banks
fictional places
flags
The Freedom Trail
Frontier Airlines
geocaching
geoguessr
Google Maps user maps
Google Street View
great circles
highway numbers
hillside letters
historical markers
Hollywood Walk of Fame
India
IP geolocation
islands
KLM houses
"The Knowledge" (London black cabs)
lakes
landmarks
Las Vegas strip
Latin names of cities
longitude and latitude
Maindenhead grid
The Mapparium
maps
Massachusetts Avenue (street near MIT)
mayors
mountains
national anthems
nationalities
national libraries
national parks
navigation way points (fixes)
neighborhoods
New Jersey Turnpike
New Orleans
Paris
places north of other places
places with the same name
provinces, states, divisions of countries
Quadrate (area in Mannheim, Germany)
rivers
roadside attractions
Salt Lake City, UT
seas
sister cities
six flags over Texas
ski trails
sports teams that moved
squares (named road intersections)
Stanford University
state abbreviations
state birds
state flowers
state nicknames
state quarters
state superme court seals
state trees
Strava (cycling and running app)
streets
SubPar Parks
subway (the T or other cities' systems)
Switzerland
time zones
toponyms (words derived from place names)
train lines (rail)
twin cities: see sister cities
UNESCO World Heritage Sites
US states order of entry
what3words
Where in the World is Carmen Sandiego?
ZIP codes
zoos