This 510-foot-long landing ship off Key Largo rewards divers of every level. The top deck at 65 feet offers gun turrets, an expansive bridge and more. Plus, the top three levels have long swim-throughs where light (aka exit points) is visible the entire way. Be warned: Should you square off with a goliath grouper in a hallway, know that it won’t budge. Penetration-trained divers have many available routes to explore.