An inconspicuous footbridge beloved by San Diego locals.

Historic funicular railway, believed to be the shortest railroad in the world.

These delicate buggers are some of the rarest fossils that have bubbled up from the Tar Pits.

Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.

This towering totem holds the title for the tallest in the world but only according to some.

The colorful, smiling concrete silos of Vancouver.

Greenery cloaks this serene sculpture inspired by the famous Lost Gardens of Heligan.

There's something big lurking beneath the surface of this tiny Oregon park.

On the Oregon coast is a natural hole that seems to be draining the sea.

This replica stave church looks like a piece of Norway was simply plopped down in South Dakota.

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

At the time of its completion, it was the tallest dam in the world.

Native Americans built this circle of stones, which was used to predict astronomical events.

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

One man's ambition created this psychedelic log home.

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.

The first declared National Monument in the United States.

This geothermal hot spring hides beneath a slowly growing mineral dome.

These memorials built by an eccentric bachelor on the side of Interstate 5 cause both wonder and traffic accidents.

A giant sculpture dedicated to a staple of South Bend food culture.

A tribute to the Nirvana frontman hides beneath the bridge that was the singer's beloved hangout spot.

This super-sized skillet is a replica of a usable giant pan where a woman once skated on bacon.