Inspiring Herman Melville and Henry David Thoreau, Mount Greylock in western Massachusetts is the highest point in the state at 3,491 feet above sea level.

Known as one of the most climbed mountains in the world, this barren peak is permanently bald thanks to an anti-wolf fire.

Towering basalt columns, a creation of fire and ice.

The highest point in Nevada had to be decided by court order after California tried to claim it as their own.

Four hundred granite steps were built into this massive rock by the National Park Service.

Quite simply the largest tree in the world (by volume).

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

The rocks in this arid basin leave trails of movement behind them.

This crumbling Death Valley mining complex was known for its use of giant, 20-mule team wagons.

"Only the devil could play golf here."

The lowest point in North America is home to an undrinkable pool surrounded by fields of geometric salt flats.

These steeply terraced ruins are a stop along the Inca Trail to Machu Picchu.

The intricate stonework of Machu Picchu serves as a testament to Incan engineers.

If you’ve ever seen a picture of Machu Picchu, then you’ve seen a picture of Huayna Picchu—you just didn’t realize it.

The stones of this Incan wall complex fit together so well you couldn't fit a piece of paper between some of them.

Death rituals and sacrifice inside a Peruvian megalith.

Dedicated to the art and science of glass in equal measure, this space is as much laboratory as museum.

Board a mine car and descend the #190 slope 300 feet underground into the Clark Vein of coal.

Local lore claims this park is named after a young woman who jumped off a cliff.

Eccentric concrete mansion and museum designed and built by hand from the inside out.

Step inside Lucy, the world's largest "elephant."

A series of gun powder chambers currently hidden from view within Nobbys Headland in Newcastle, Australia.

The bones of this aquatic dinosaur turned to opal over the centuries and the beast's remains were almost sold as jewelry.

This historic observatory contains the world's oldest refracting lens telescope.