Art in the form of a winding, man made crack in stone.

Frank Lloyd Wright died a year before construction on his largest public project even began.

The now-abandoned tunnels were built for the transcontinental railroad on the route where the first wagon train entered California.

The lighthouse central to the 1980s horror classic "The Fog" is, in fact, located in one of the foggiest areas of the Pacific Coast.

An extensive collection of ancient Egyptian artifacts and mummies.

The headquarters of a secretive order is also a beautifully-designed park.

The graffiti-covered remnants of a former triangulation station are balanced precariously on this California peak.

A tiny survivor of the Donner Party disaster.

Take shelter from Hawai'i's tropical heat under the massive canopy of largest Banyan tree on the island.

Earth's tallest volcano is sacred to Native Hawaiians, and home to a dozen world-class observatories.

A former waterfront market is now in the center of town due to some interesting Boston engineering.

This monument on Breed's Hill proves that one of the most famous battles of the Revolutionary War is misnamed.

"the sweltering inhabitants of Charleston and New Orleans, of Madras and Bombay and Calcutta, drink at my well . . . The pure Walden water is mingled with the sacred water of the Ganges."

Berthed at the Charlestown Navy Yard in Boston, "Old Ironsides" is the oldest commissioned warship still afloat.

The site of Paul Revere's historic two lantern warning.

This Yellowstone geyser may not shoot as high as the nearby Old Faithful, but it erupts for considerably longer.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

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

A beautiful geyser under environmental threat.

Home to the deepest rift anywhere on Earth.

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

A collection of colorful dinosaurs hidden in an actual rainforest.

A roaring, awe-inspiring double cascade of icy water flows through woodland Oregon like something out of a Tolkien novel.

Go inside to really appreciate this 500-year-old technological masterpiece.