You could watch the movie "Teenage Mutant Ninja Turtles" to see fun movie about turtles. Contacting a volunteer organization such as Sea Turtle Trackers to help with conservation efforts.  As always with animals, a trip to the zoo provides a great way to see giant or rare type of turtles that are not native to your area.

There are about 6.5 million sea turtles in the world.

The common terms "turtle", "tortoise" and "terrapin", are common names. "Tortoise" usually means any land-dwelling, non-swimming chelonian, while "Terrapin" is used for several species of small, edible, hard-shell turtles. Turtles are reptiles of the order Chelonia They are characterized by a special bony or cartilaginous shell developed from their ribs that acts as a shield. The word "turtle" is generally restricted to fresh-water and sea-dwelling Testudines. Of the 360 known extant species,some are highly endangered.
Turtles are classified as amniotes, along with other reptiles, birds, and mammals. Like other amniotes, turtles breathe air and do not lay eggs underwater, although many species live in or around water, and the retraction of their necks so that their heads and bodies are completely enclosed by their shell are something very unique among any living creature.