CREATE TABLE table_204_498 (id NUMBER, "location" CLOB, "building" CLOB, "year" NUMBER, "km" NUMBER, "monument" NUMBER)

which location has the most km ?
SELECT "location" FROM table_204_498 ORDER BY "km" DESC LIMIT 1
SELECT "location" FROM "table_204_498" ORDER BY "km" DESC FETCH FIRST 1 ROWS ONLY