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Sewer Guide
Paris

Le Musée des Ègouts (the Museum of the Sewers) has been a runaway hit in Paris since it first opened to smell-tolerant visitors in the 19th century. Today’s guides are often ex-sewer workers, so presumably have developed a threshold for the potential aromatic hazards. Ask for the museum’s English-speaking interpreters to come along too. Sewer lines correspond by name to the streets above, and you can sometimes see (hold your applause!) pipes emptying from the corresponding homes.

Where to Spot Them: The tour starts near Pont d’Alma on the Left Bank; open year-round but closed Thursdays and Fridays (011-33-1-53-68-27-81). Admission is about $6. —Katrina Brown Hunt