17,400 lbs., 12 feet in diameter, and 29 years in the making.

A gothic church spire sits atop this skyscraper, the tallest church in the world.

An apocalyptic seismic event creates a deadly chain reaction that ends with a 6-mile long lake developing within weeks.

A beautiful geyser under environmental threat.

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

This structure among the trees was the result of divine inspiration.

An abandoned quicksilver mining town surrounded by the Big Bend parks.

A bronze statue dating back as far as 1252, still has remnants of gold on its right cheek from ancient gilding.

Memorial to the father of the Republic of China.

Massive series of 45 caves and over 51,000 sculptures carved from cliffsides in China.

A mysterious castle built as a monument to lost love.

Half-sized replica of the Leaning Tower of Pisa built to honor Galileo.

The home of 1.5 million wood letters for printing is still a functioning workshop.

The seawater playground of gilded-era San Francisco burned to the ground in 1966.

The "world's biggest dinosaur" once housed a creationist museum in its abdomen.

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

Explore 10 acres of environmental sculptures.

A hand-built folk art installation covered with messages of God's love.

The ghostly remains of an accidental sea.

Old-fashioned knowledge and modern engineering create the world's only rotating boatlift.

This freshwater spring fills with 10,000 gallons of water per minute.

Impossibly life-like natural history models created out of glass by a father and son.

This massive redwood tree has a hole in the base big enough to drive through.

A 100-year-old purveyor of curiosities, curios, and kitsch featuring mummies, shrunken heads, and a Fiji Mermaid.