US First Lady Melania Trump has visited a former slave fort in Ghana on the second day of her solo trip to Africa.
She said the “dungeon is really something that people should see and experience” and “what happened so many years ago is really a tragedy”.
People were kept naked and chained in the 17th Century Cape Coast Castle, waiting to be shipped as slaves.
Mrs Trump’s African tour will include Kenya, Malawi and Egypt and is intended to promote children’s welfare.
President Donald Trump has not visited Africa since taking office in January 2017.
In February, a row broke out after he allegedly used “shithole” to describe some African nations.
Mrs Trump’s week-long trip to the continent is seen as helping to heal some of the divisions.
What has Mrs Trump been doing in Ghana?
The highlight on Wednesday was her tour of Cape Coast Castle, a major outpost on the Atlantic slave trading route.
She first paid a courtesy visit to a local traditional ruler, Osabarimba Kwesi Atta II, meeting him in Obama Hall, named after former US President Barack Obama.
Mr Obama, the first African American president, visited the castle in 2009, with his wife, Michelle, a descendant of African slaves, and their two daughters.
After being shown around the castle and given a history lesson about it, Mrs Trump said: “It’s very emotional. I will never forget [the] incredible experience and the stories that I heard.”
On Tuesday, Mrs Trump visited, alongside Ghana’s First Lady Rebecca Akufo-Addo, the Ridge Hospital in the capital, Accra.
Mrs Trump observed babies being weighed as part of a project aimed at promoting nutrition in children, which is supported by funding from the US government’s foreign aid organisation, USAid.
Has Mrs Trump visited Africa before?
Ahead of her trip Mrs Trump said that she was looking forward to visiting “four beautiful and very different countries in Africa”.
“She is interested in Africa because she has never been before and knows that each country will have its own unique history and culture.” Stephanie Grisham, her communications director, said.
Mrs Trump said that she was looking forward to seeing how the US can continue working together with Malawi to support a USAid programme that is focused on children’s education.
The first lady also highlighted the work the US was doing in Kenya to support early-childhood education, wildlife conservation and HIV prevention.
“My final stop, which is Egypt, will focus on the country’s tourism and conservation projects,” she said.
How has she been received?
Mrs Trump has got a warm reception, but huge crowds have not lined the streets to welcome her, as they did for the Obamas.
Views about the visit have been mixed. “I think Melania is a great woman. Her story is particularly inspiring,” one resident of Accra told the BBC.
But another said “she doesn’t inspire me” comparing her unfavourably to former First Lady Michelle Obama, who travelled to Ghana with her husband on a trip in 2009.