It’s hard to capture the scale, and with the hazy weather you can barely see the new bigger lock being constructed next door (where the lock will be the size of 4 football fields)
That tanker coming in paid $100K to transit the canal once.
Visitor center (US$15) itself is so so, but I don’t think you can see the lock without going through it (they have several raised viewing decks)
US$8-10 each way for a taxi to get there.