See the 4 answer words debuted by Tao Platt.
W | O | N | K | C | H | A | N | G | S | A | S | K | ||
E | R | S | E | R | O | B | E | R | T | M | I | A | ||
S | C | A | N | D | I | N | A | V | I | A | I | N | N | |
K | O | B | E | E | G | G | I | E | S | T | ||||
E | S | S | E | X | R | I | G | |||||||
L | O | W | N | E | S | S | F | I | N | L | A | N | D | |
O | D | E | D | E | T | E | R | G | O | L | O | W | ||
P | O | D | S | C | O | M | E | T | O | G | R | E | ||
E | P | E | E | S | C | U | R | I | E | O | W | L | ||
D | E | N | M | A | R | K | E | N | T | H | R | A | L | |
I | V | E | H | U | E | Y | S | |||||||
P | E | R | S | I | S | T | P | A | I | R | ||||
A | X | E | N | O | R | D | I | C | C | R | O | S | S | |
L | I | L | G | R | E | E | N | E | A | R | I | A | ||
S | T | Y | S | T | E | W | E | D | H | A | M | M |
Coincidental discovery is common in science, and coincidental theme ideas happen in crosswords too. Ross Trudeau published Six Flags Europe on his personal site a couple of weeks ago.