VISITORS using the restrooms on the 18th floor of an exclusive New York hotel may get a fantastic view through floor-to-ceiling windows — but passers-by can’t say the same.

Bathroom users at the Boom Boom Room club at the swanky Standard Hotel in Manhattan are entirely visible to people on the street thanks to the 3-meter windows lining the walls.

And it’s a discovery that has alarmed some unaware toilet-goers as there is no warning sign that their bare behinds will be seen — and sometimes photographed — by strangers below.

“The view outside is exciting, but the view inside is frightening,” said visitor David Langdon, 55, from Melbourne, Australia.

“I saw people waving at me! Sitting on the royal throne, you don’t expect a public viewing.”

His daughter Belinda Langdon, 24, believed the windows were reflective on the outside, making it impossible for people to see inside the hotel, which is known for its celebrity sightings.

The windows are visible to tourists visiting the High Line park, a public area which is built on an historic freight rail line elevated above the streets on Manhattan’s Meatpacking District.

Rows of bathrooms line the walls of the building with users sitting close enough to the windows for passers-by to see them sitting and relieving themselves. There are no curtains or blinds on the windows for the more bashful customers wishing to avoid giving jaw-dropping views to the tourists below.

Among the toilet users are people visiting the club and a rooftop lounge at the hotel, which is favored by celebrities including Leonardo DiCaprio and Cameron Diaz.

But some patrons said they do not care about their very public display, with one man even waving to people below as he used the toilet.

“Who cares? So people know you have to pee?” said Florentina Ballesteros, 26. “The view was wonderful both ways!”

Managers at the Standard refused to comment on the bathrooms. (SD-Agencies)