5. Switzerland and France

Border: Hotel L’Arbézie Franco-Suisse
Area: 573 km* (total border length)
Est. Gross Domestic Product: $3.049 trillion (France) / $640 billion (Switzerland)*
Situated in the charming mountain village of La Cure, on the border between France and Switzerland, Hotel L’Arbézie Franco-Suisse provides visitors with an experience that cannot be matched. Constructed during Napoleon III’s boundary redraw in the 19th century, this quaint hotel makes the most of its unusual location by letting visitors dine and sleep in two different countries at the same time.

Switzerland and France © Wikipedia/Roland Zumbuehl
The hotel’s quirky past goes beyond its dual citizenship; the original owners’ sons converted it from a house with a bar on the French side and a store on the Swiss side into a hotel.