Explore the underground ossuaries in Paris, holding the remains of more than six million people
Visit the unique Skull Chapel in Czermna, Poland, a chapel decorated with human skulls and bones
Visit animal cemetery, a unique place dedicated to the memory of pets and other animals
Naples' notorious sail-shaped housing estate — brutalist symbol of Gomorrah, now mostly demolished
The perpetrators of the Indonesian massacres restage their killings as film scenes.
A White Sea island fortress-monastery that became the first camp of the Gulag.
Ruined British slave fort on an island in the Sierra Leone River, from which thousands were shipped to the Carolinas.
Slave-trade island, UNESCO-listed.
Poignant slave-trade island, UNESCO-listed.
Basalt peak above the lagoon where runaway slaves hid, now a UNESCO site with a steep, rewarding summit trail.
Moving memorial to the 1994 genocide.
Sobering slave-trade fortress, UNESCO-listed.
The hand-dug tunnel under Sarajevo airport that kept the besieged city supplied for three years in the 1990s.
The oldest European building in sub-Saharan Africa, a haunting slave-trade fort.
Memorial arch on the beach where enslaved people were forced onto ships.
Choeung Ek memorial outside Phnom Penh, a stupa of skulls marking the Khmer Rouge mass graves.
The canal house where Anne Frank hid for two years and wrote her diary, with the original bookcase door.
Sober memorial village commemorating the Belarusian villages destroyed in WWII.
Meet the thousand-year-old dead of Chauchilla, sitting in their open desert graves with hair and textiles intact
Walk the ghost settlement of Santa Bárbara, the colonial mercury mine they called 'the mine of death'
Israel’s Holocaust memorial and museum on the Mount of Remembrance in Jerusalem.
A chapel decorated with the bones of 40,000 people — chandelier included — beside the Gothic St Barbara’s Cathedral.
The Death Railway bridge built by Allied prisoners of war in 1943, still crossed by trains today.
Walk through chapels decorated entirely with the bones of 3,700 Capuchin friars
Primo Levi's clear-eyed memoir of survival in Auschwitz — essential, unforgettable witness
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