The world's longest known cave system.

The twin towers in this Chicago fountain use 50 foot tall video screens to spit on people.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

University City's quirkiest resident lives in a park named after its first.

At the most northwestern point of the contiguous United States lies a trail leading through an ancient forest to stunning cliff-side vistas and massive oceanside caves.

Shoreline strewn with the remains of ghostly fallen trees.

This tree has witnessed nearly 1,000 years of history.

This large Sitka spruce that appears to be floating in mid-air, has defied logic for years.

Where Nor'easters go to die.

A massive sea stack famous for its appearance in The Goonies.

This unassuming cheese empire in rural Oregon churns out more than 150,000 pounds of cheese each day.

No one knows how this Pacific Northwest spruce tree came to have so many trunks.

This enormous monument is one of the most iconic structures in Tokyo, rudely nicknamed "The Golden Turd."

Tragic reminders of the 1945 firebombing campaign over Tokyo still haunt this bridge.

Traditional 15th century Chinese garden in the middle of Vancouver.

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

This alley in downtown Chicago held the bodies of over 600 people after the fateful Iroquois Theatre fire.

Fragments of architectural wonders from around the globe are embedded in the newspaper building's walls.

Surprisingly delicious Asian-style hot dogs.

A working steam clock, one of only a few in the world, located in Vancouver's Victorian Gastown.

This conservatory allows a little bit of the tropics to thrive in the middle of a major Canadian city.

This high point in the Great Smoky Mountains is said to be home to the chief of all bears.

An abandoned town is hidden in Great Smoky Mountains National Park.

Three connected pink triangles memorialize persecuted gays and lesbians throughout history.