CREATE TABLE table_203_839 (id NUMBER, "station" CLOB, "type" CLOB, "latitude" CLOB, "longitude" CLOB, "el.  ( m ) " NUMBER, "opened" NUMBER, "closed" NUMBER, "coordinates" CLOB)

the top elevation measured for this station is 2591m
SELECT "station" FROM table_203_839 WHERE "el. (m)" = 2591
SELECT "station" FROM "table_203_839" WHERE "el. (m)" = 2591