The National Trust has been criticised for the "woke" introduction of gender-neutral toilets at a property due to fears they could appear elsewhere.
A woman recently said she opened a toilet door in Tredegar House in Newport, South Wales, to see a man urinating without the door locked.
A sign on the lavatory door at the café said: "Gender neutral toilets. Alternative toilet facilities are available by the main car park."
Bosses said the revamp was introduced during refurbishment, and men's, women's and accessible toilets remain available elsewhere on the premises.
Despite this, visitors have threatened to cancel their membership, which costs £76.80 a year for adults or £133.80 for a family.
Tredegar House in Wales is now offering gender neutral toilets.
Image: Google Maps
Some have also floated the possibility of boycotting its 500 sites across Britain.
One visitor from Cardiff called Bethan hit out at the National Trust after saying she witnessed a man urinating without the door locked.
She tweeted: "National Trust, I was forced to use your 'gender neutral' toilets. I was walking my friend's dog alone so had no choice but to take her with me.
"First door I tried opened to reveal a man peeing without the door locked.
Gender-neutral toilets have sparked anger among some sections of the National Trust membership base.
Martin Keene
"I didn't want to take the dog in my cubicle with me so. She sat outside my partially open door, and while I was sorting out my sanitary products, a man started a conversation with the dog, until I called out that she was with me.
"Everyone is involved was mortified, so please tell me how your 'gender neutral' toilets are inclusive?"
Another social media user told the National Trust to "stop being woke".
They tweeted: "Hi National Trust, stop being woke and restore the status quo regarding toilets."
A National Trust spokesman told the Daily Mail: "At Tredegar House we have men's, women's and accessible toilets near our visitor reception.
"We have put temporary signage up on the toilets at the Brewhouse while we carry out essential maintenance work.
"The sign explains that we have alternative toilets available near the visitor reception."