One Costa Rican island is so beset by illegal shark poachers that the local rangers have built an entire bridge with their confiscated gear .

Where dogs like the rare "Fire-Tailed Border Cocker" run free on the mountainside.

Barcelona's historic 19th-century sewers, whose foundations were laid in medieval times, are open to the public for exploring.

A staggering collection of photographs depicting medical, social, and historical change.

Rummage through this sunken ship, but leave your scuba gear at home.

This hidden library of physiological ephemera contains centuries worth of knowledge on the vim and viscera of the human body.

Long the exclusive domain of birds and vagabonds, this little-known Central Park peninsula is open to the public once more.

Curious crustaceans support an obelisk from ancient Egypt that now stands in modern-day Central Park.