The Hunt-class minesweeper HMS Middleton was open to the public at HMS President. No, they didn't let me look at the engines, and I understand she's recently been given new ones anyway. Images follow: cc-by-sa on everything.
The People's Liberation Army Naval Air Force has been making substantial, though largely ignored, efforts to gain a carrier aviation capability.
The YF-23 was a prototype that competed against the Lockheed YF-22 to become the USAF's Advanced Tactical Fighter in the 1990s; the Lockheed plane won.