"Sacré-Coeur is a Catholic basilica that sits on the highest hill in Paris, in the Montmartre neighborhood. Its height is topped only by the Eiffel Tower. The basilica's distinct white travertine façade gives the Romano-Byzantine structure a unique look among Parisian monuments. The church is open all day to anyone who wishes to visit, though big crowds mean you may have to wait to go inside." - Melissa Liebling-Goldberg, Julia Eskins