One of the most beautiful bookstores in the world hides a neo-Gothic interior behind an art nouveau facade.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

Construction of Barcelona’s iconic (but controversial) church was finally completed in 2026—a century after the death of its architect.

A Franco-era dam flooded (almost) everyone out of this centuries-old Aragonese town.

This massive underground salt mine now holds a sci-fi theme park in its depths.

Conspiracy theories and occult legends surround this mysterious natural rock formation.

This once-derelict building is now one of the most beautiful bookstores in the world.

This communist behemoth is the heaviest building in the world and a legacy of a brutal regime.

A crumbling island fortress that seems to be covered in a field of stone crosses but is simply incomplete.

Hike along an abandoned railway up to a popular pilgrimage site.

A unique combination of a lighthouse and a poignant memorial to the fallen of the two world wars.

Sitting on an Italian hilltop is this surreal fortress built by the mad inventor of electrohomeopathy.

A design by master architect Alvar Aalto in a small village in the Apennines near Bologna.

A map of Italy made entirely of trees.