France

One of the most famous cathedrals in the world, Notre-Dame Cathedral is an Early Gothic beauty famed for its historical importance, fascinating sculpture, and medieval stained glass.

Nestled among lavender and sunflower fields, this medieval monastery is best known for its association with Vincent Van Gogh, who was treated for mental illness here in 1889–90.

One of the most famous monuments in Paris, the Roman-style Arc de Triomphe was commissioned by Napoleon in 1806 to celebrate military victories and honor the memories of fallen soldiers.

This Carolingian oratory near Orléans was built in 806 by Bishop Theodulf, Charlemagne's adviser. Containing rare Byzantine mosaics, it is one of the oldest and most unique churches in France.

Visible from nearby Arles on its hilltop, the Abbaye de Montmajour was mostly constructed in the 12th century and is now a World Heritage Site.