The self-taught artist Abraham Lincoln Walker worked in his basement on phantasmagorical paintings, discovered by the art world more than 30 years after his death.

Keni Arts, as Keni Davis is known, was friendly and willing to talk – so long as he could keep painting.

Whether you're a thrill-seeking solo traveler looking for the world's most intense roller coasters ... Disney and Universal dominate the list with their famous theme parks in the U.S. and abroad ...