what are the coolest buildings in your state? my votes for colorado: bent's fort, cliff palace, the state capitol, and union station
modernist weirdness: charles deaton's wonderfully goofy bank in englewood, and his "sleeper house" above genesee; the air force academy chapel
denver houses of worship: assumption greek orthodox church, former temple emanuel (cc: @ConorMichael28), cathedral of the immaculate conception, trinity united methodist
our two hand-built castles: bishop's castle near rye, and the much lesser-known cano's castle in antonito
grand hotels of the mountains: the beaumont in ouray, the delaware in leadville, the meeker... in meeker, hotel colorado in glenwood springs
opera houses: the tabor in leadville, the central city opera, the wright in ouray, and my favorite: the opera house in the tiny windswept prairie town of grover, currently for sale for $85,000! anyone wanna go in on an abandoned opera house with me?? https://www.realliving.com/commercial-for-sale/224-Chatoga-Ave-Grover-CO-80729-276598978
great interiors: brown palace, dushanbe tea house, union station, mountain states telephone & telegraph
denver church interiors: st. john's cathedral, holy ghost, assumption greek orthodox, trinity united methodist
industrial: old colorado fuel & iron mill in pueblo, gates rubber (gone!), walsenburg power plant, great western sugar mill in longmont
general stores/mercantiles: r&r market in san luis, bedrock store, green mercantile in buffalo creek, maybell general store
bridges: royal gorge bridge, royal gorge hanging bridge, devil's gate trestle on the georgetown loop, rainbow arch bridge in fort morgan
building with logs: dexter house in twin lakes, black forest community church, echo lake lodge, gold hill inn
~fancy castles~: miramont in manitou springs, redstone in redstone (thanks @SchmellyDog), dunafon in idledale, glen eyrie in colorado springs
higher education: loretto heights, westminster castle (thanks @shydenverguy), cu boulder's old main, center for the arts at csu fort collins
theaters of denver: mayan, paramount (thanks @CPRMarkus), oriental, gothic (englewood)
holy places of hispano colorado: stations of the cross shrine in san luis, ave maria shrine in trinidad, sacred heart catholic church in alamosa, morley church ruins
colonnades of denver: mcnichols building, tenth circuit court, voorhies memorial, cheesman park pavilion
ancestral puebloan ruins (cc: @Michal_Rose): square tower house, cutthroat castle, mancos canyon ruins, chimney rock great house