Read If This Is a Man

Naples' notorious sail-shaped housing estate — brutalist symbol of Gomorrah, now mostly demolished

Walk through chapels decorated entirely with the bones of 3,700 Capuchin friars

Explore the underground ossuaries in Paris, holding the remains of more than six million people

Visit animal cemetery, a unique place dedicated to the memory of pets and other animals

Visit the unique Skull Chapel in Czermna, Poland, a chapel decorated with human skulls and bones

The Death Railway bridge built by Allied prisoners of war in 1943, still crossed by trains today.

A chapel decorated with the bones of 40,000 people — chandelier included — beside the Gothic St Barbara’s Cathedral.

Israel’s Holocaust memorial and museum on the Mount of Remembrance in Jerusalem.