(CNN) Yes, there's even a women's march in Antarctica.
On the first full day of Donald Trump's presidency, thousands of marchers have gathered in more than 600 cities across the globe in protest -- from Washington to London.
March organizers told CNN the offshoot march consists of about 30 people aboard a ship in the international waters of Antarctica.
The organizers said the participants include eco-minded tourists and non-government scientists, who are raising signs that read slogans including "penguins for peace" and "seals for science."