San Francisco's newly reopened hands-on science museum.

The miraculous hydrant that saved the Mission District in 1906.

Not merely a museum – but a whirring powerhouse that offers a subterranean peek into the heart and soul of cable car operations.

The oldest burial ground in the city, final resting place of city founders, Ohlone natives and murderers alike.

Furniture tries to escape an abandoned building in San Francisco.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

Air Force Academy Chapel made of 100 identical tetrahedrons works to inspire those of all religions.

The final resting place of American icon Buffalo Bill, and a museum that aids in telling his tale.

Even in death, he's still your huckleberry.

This prehistoric sinkhole lured exclusively male mammoths to their death, much to the delight of science.

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

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.

An architect's childhood fantasy treehouse made real.

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

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

The only natural lake in the world that drains into both the Atlantic and Pacific Oceans.

Creek water that starts here has a 50/50 chance of ending up in the Atlantic or the Pacific.

The first declared National Monument in the United States.

These once-beautiful historic graveyards are set against the barren Virginia City hills.

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

Finally the worlds of UFO enthusiasts and beef jerky lovers have come together in this roadside shop.

This giant temperature attraction created some giant electric bills.

Where NASA's satellites and rovers phone home.