The UK government has warned gay and transgender travellers to be careful in the US due to legislation in North Carolina and Mississippi.
"The US is an extremely diverse society and attitudes toward LGBT people differ hugely across the country," a travel advisory from the UK reads.
North Carolina's law states that transgender people must use public bathrooms according to the gender on their birth certificates.
It is "both frightening and embarrassing that one of our nation's staunchest allies has warned its citizens of the risks" of travelling to the US, said Ty Cobb of the Human Rights Campaign.