The odors include carbolic soap, crusty bread, rum, urine, vomit and horse manure, said Lucinda Comport and Natalie Fey, who are on the museum’s interpretation team, in an email.

— The scent of Brunel’s SS Great Britain, a restored steamship in Bristol that calls itself the “world’s smelliest museum”, from Exhale Through the Gift Shop, a look at how museums are using smell, at The New York Times.

For most of the US, autumn is also characterized by lower temperatures and less humidity. “Cooler air holds fewer molecules, meaning fewer things are floating around for our noses to detect—the air is less ‘cluttered’ than during warmer, more humid seasons,” Dr. Crimmins says. This all accounts for the “crisp, clean” feeling and aroma we attribute to fall air, she adds. But while nature plays a role, it’s not necessarily the odor of decaying leaves or lower humidity that we enjoy and remember so vividly—it’s all the sensations that come with those changes.

— Read more in The Scientific Reason Why the Smell of Autumn Makes You So Emotional at Self.