Trains and Traditions, a Cincinnati Holiday at Krohn Conservatory Krohn Conservatory is upping the whimsy factor this winter with floral show Trains and Traditions, a Cincinnati Holiday. The exhibit features "a tapestry of colorful poinsettias, charming garden railways and beautiful replicas of Cincinnati landmarks created out of 'botanical architecture' by local artisans Applied Imagination," per the Krohn. Look for mini but elaborate stick-like renderings of structures including the Roebling Suspension Bridge, Taft Museum of Art, Union Terminal and the Krohn itself. Trolleys, streetcars, Cincinnati-themed locomotives and even Thomas the Tank chug along both elevated and eye-level railways, all surrounded by holiday flowers, blooming schlumbergera (aka Christmas cactus) and other verdant greenery.