This former wildlife sanctuary is being transformed into an art park.

This inanimate goat created by the "welding nun" has been helping to clean up the city of Spokane for more than 40 years.

Cross the Continental Divide through an old railroad tunnel, and ride back to the top on a shuttle.

A mining town, now abandoned, was built in a canyon so narrow that the railroad ran right through the hotel lobby.

Look closely and you’ll notice that the color changes a third of the way up the tower.

The tallest The Church of Jesus Christ of Latter-day Saints temple in the world soars above the Beltway.

The extensive collection of an amateur naturalist.

These 100-year-old tunnels in downtown Provo house artists, restaurants, and a few surprises.

A giant donut stands as a popular symbol of Los Angeles iconography.

A 19th-century Gothic, castle-like statehouse by the Mississippi River.

Cryptic messages embedded in the New York City sidewalk.

Oldest building in California still in use.

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

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

This industrial area was the dumping ground for massive amounts of trash, some of which washes up as tiny bits of sea glass.

One man's exploration of the human form, including the bizarre and delightful "Man Attacked by Babies."

Copenhagen's celebrated theme park and gardens.

This oddity shop contains everything from antique tools to a human skeleton.

It was once used as a classroom to teach mining skills to local high school students.

The mayor made the declaration in 2004.

This trail leads to a mine that was used as a sanctuary during the Great Fire of 1910.

This playground sculpture of an icon from the past is dedicated to the children of the future.

Where beautiful signs live on forever.

Once strictly off-limits, this lower level housing curious and priceless vehicles of the Petersen Automotive Museum is now open to the public.