Did you know John Quincy Adams is the subject of the oldest existing confirmed photograph of a US president ? (It was taken in March 1843 by Philip Haas in Washington, DC. Adams had two daguerreotype sessions with Haas that month.)

Did you know he kept a pet alligator in the White House bathtub ? (A gift from Marquis de Lafayette and he put it in a bathtub, reportedly to scare guests.)

Did you know he installed a controversial billiard table in the White House for his nightly games ?

Did you know he was the only president to serve in Congress post-presidency ? (He was elected to the House of Representatives, where he became a leading voice for the anti-slavery movement, famously arguing the Amistad case.)

Did you know Adams enjoyed swimming naked in the Potomac River every morning ?