A graphic joking about a murdered sex worker, and another about infecting a partner with a sexually transmitted disease were posted on the attraction's Twitter feed.
Critics said the collection of images was sexist and offensive.
Merlin Entertainment said it was "very sorry" for the campaign and has deleted the tweets.
The group said it had wanted to run a "dark Valentine campaign" to promote the London Dungeon, in which visitors are taken on a tour through London's dark history.
But many Twitter users complained that many of the images tweeted were in poor taste and inappropriate for a family tourist attraction.
Rebecca Reid, a columnist for the Telegraph, said: "The biggest issue here is taking violence against women and turning it into a joke or a cheap marketing ploy."
She told the BBC: "Just because these rapes and murders happened in the past doesn't mean they are fair game.
"Violence, rape and murder are all still a very brutal reality of life for modern day sex workers and these flippant tweets show no awareness or respect for that."
Merlin Entertainment said: "Our brand tone of voice tends to divide audiences. However, we recognise that we've upset some people and for that we're very sorry."

Flt Lt Jon Egging, 33, from Rutland, died when his Hawk T1 aircraft - Red 4 - crashed after a display at Bournemouth Air Show in August 2011.
A new display will open at the Bournemouth Aviation Museum which includes a model Red Arrow Hawk T1A.
It will also include a collection box for the Jon Egging Trust, a charity set up in the pilot's memory.
Museum trustee David Shore said: "After running a Red Arrows day last August and the level of interest it generated, we decided we wanted to do something in Flt Lt Egging's memory.
"We had discussions with a model maker at last year's Bournemouth Air Show about creating a display for us.
"The display will have information on both Flt Lt Egging and the history of the Red Arrows with a collection box for any donations to the Jon Egging Trust."
The trust helps young people with vocational and academic qualifications. Its Blue Skies Programme pairs students with role models from aviation, engineering and science.
Bournemouth Aviation Museum's display is the latest tribute in the town to Flt Lt Egging.
In August 2012, a sculpture on Bournemouth's East Overcliff was unveiled featuring three glass Red Arrows planes and stainless steel contrails to coincide with the first Bournemouth Air Show since the crash.

Staff have been told the posts will go by March and will mainly affect management and head office roles in Manchester and Stockport.
Deputy chief executive Liam Coleman said the cost reductions were "critical" as it continues its three-year plan to rebuild the business.
The bank almost collapsed in 2013 and it expects to continue to be loss-making until the end of next year.
Mr Coleman said: "These cost reductions are critical to progressing our turnaround and delivering a cost base which supports a sustainable core bank."
He said it would continue to consult colleagues and trade unions on the proposals over the coming weeks.
"We have made progress in turning the bank around since 2013, but have always been clear that the bank's recovery is a difficult journey."
He said the business would not make a profit this year or next year while it continues its "turnaround plan in a challenging economic environment".
Rob MacGregor, national officer at trade union Unite, said: "The speed and breadth of these cuts will hit the Co-operative Bank's much cherished customer service and with it the bank's unique selling point.
"Compulsory redundancies are anathema to all trade unions, but the timing of this exercise just before Christmas is a real blow to our members."
He said the union would be supporting members and pressing the bank to reconsider the cuts where possible.
The bank was owned by the Co-operative Group until 2013, when a Â£1.5bn hole was discovered in its finances.
The group had to go to outside investors to support the Co-op Bank, which is now 80% owned by US hedge funds, with the remainder held by the Co-op Group.
The London Dungeon tourist attraction has apologised for a promotional Twitter campaign that backfired.
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A new memorial will be unveiled later in honour of a Red Arrows pilot killed in a crash during an air show.
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Co-operative Bank is cutting 200 jobs as it looks to continue its recovery.