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CAPE COAST, Ghana — Melania Trump said Wednesday that she "will never forget" her visit to a former slave holding facility on Ghana's coast.

She called it "very emotional" and "really something that people should see and experience."

The U.S. first lady spent nearly an hour on a guided tour of the 17th-century castle, which originally was built by the Swedes for the trading of timber and gold but eventually became a warehouse for slaves shipped to the New World.

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"I will never forget (the) incredible experience and the stories I heard. The dungeons that I saw, it's really something that people should see and experience," she said after she was asked to reflect on the visit.

The first lady was led around the facility by museum director Kwesi Essel-Blankson. She spent about 10 minutes inside the dark, cramped dungeon where male slaves were housed. She then walked down a pathway leading to the "Door of No Return," where slaves were shipped to the New World with no hope of returning to Africa.

She walked out and back through the door with the guide before she laid a wreath, observed a moment of silence and signed a guest book.

"It's very emotional," the first lady said before departing.