A room hidden behind a swinging shelf in the children's section.

More than 350 million years ago, western New York was covered in a vast sea. Today, you can dig up the remains of the plants and animals that lived there.

This petite park lets visitors see and touch examples of fossilized dinosaur tracks.

A parade of antique steeds offers a quirky ride through history.

A burial vault located under Tiber Island in the middle of the Italian capital.

Over 20,000 sets of spice shakers reveal the surprisingly telling history of our most basic spices.

Mile-long cave system near Great Smoky Mountains.

This bazaar is one of the oldest in the Arabian world.

An amazing stag sculpture constructed entirely of discarded materials.

In Kolkata's China Town, a temple to the Hindu goddess Kali.

In 1329, Christine Carpenter entered this small stone cell in the hopes of becoming a living saint.

Does this 10-foot-tall statue carved into a rock face depict a king afflicted by a skin condition or a Buddhist figure?

12,000 sq. ft. museum tracing erotic art from antiquity to modern times.

The remains of a 37,000-year-old prehistoric society were discovered in this mammoth cave, one of the largest in Asia.

Under the right circumstances, this waterfall in Yosemite briefly turns a luminescent fiery orange.

An old whaling station now serves to give the public a look at the commercial whaling industry, no longer a part of Monterey's economy.

A tree grown from astronaut seeds which were exposed to cosmic rays.

This cabin from the 1850s is one of the first structures built by Chinese immigrants in California.

A psychedelic labyrinth on the San Francisco bay.

A huge musical instrument played by the ocean.

You can cross from one country to another in a single hop on this little bridge.

According to folklore, Vermont's slanted windows were installed to keep witches from flying into the house.

A giant green dragon crawls down from the roof of the Providence Children's Museum.

This twisty section of highway in the Himalayan foothills is lined with thousands of small mirrors.