The only university zoological museum in London houses extinct animals, bizarre natural history specimens, and a Micrarium of microscopic creatures.

These remote Florida islands have a history of sea turtles and sunken treasures, and one of the world's largest coastal brick fortresses.

A beautiful but toxic fountain of mercury.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

Bioluminescent firefly squid light up this Japanese fishing port.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

Eons ago, a rushing lava river formed this pristine passage through solid rock.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

Extraordinary sculpture garden created by an eccentric English poet.

An underground city of salt.

Each spring, a dreamlike carpet of bluebells overtakes the forest floor.

A Swedenborgian glass church surrounded by redwoods sits perched atop a massive landslide area.

Cat art as far as the eye can see.

A marvel of Byzantine engineering under the streets of Istanbul.

Venice's "Island of the Mad."

Amazing and mysterious Neolithic settlement on Scotland's Orkney Islands.

An Escher-inspired library dedicated to the wonders of the human mind, yet closed to the public.

A take-out restaurant that only serves cuisine from countries with which the United States is in conflict.

The atmospheric road was never meant to be so creepy.

A counter-culture bookstore like no other hides in plain sight in the streets of Paris.

A sprawling Baroque park with 300-year-old hydro-pneumatic waterworks.

A book collector's dream, this Toronto bookstore has the world's first "Biblio-Mat," a random book vending machine.

Once thought to be the oldest living tree in the world, Methuselah was germinated before the Egyptian pyramids were built.

Peek through a transparent pyramid and drink in the mountain made of books.