A marvel since its debut in 1890, the Eiffel Tower is renowned worldwide for its architecture and beauty. Along with it, Gustave Eiffel became a name synonymous with a historical masterpiece when it opened as well.

But for years Parisians envied Eiffel for a different reason: His apartment is a subtle feature of the monument's structure, and for years it had been exclusive, hosting science's elite such as Thomas Edison.

Now the most prestigious address that's not 1600 Pennsylvania Avenue is open to the public, for viewing only.

The small but cozy apartment is located on the third level of the monument and is "furnished in the simple style dear to scientists," according to Henri Girard's book "La Tour Eiffel de Trois Cent Metres" (The Eiffel Tower of 3000 Meters).