A monument to the frontier doctor who came up with the idea of delineating highways with a painted line.

Nestled in Coachella Valley, this museum transports guests from the Mesozoic Era, to the land of Egyptian kings.

A Swedenborgian glass church surrounded by redwoods sits perched atop a massive landslide area.

A 250 million-year-old rock formation has earned a rather unique nickname.

This outdoor observatory offers stellar views and a scale model of our solar system.

Small museum packed with artifacts recovered by the man rumored to be the real-life inspiration for Indiana Jones.

This forgotten Frank Lloyd Wright house is an architectural marvel at the end of a sleepy residential street.

The first all glass and steel residence in the United States.

A common entry point to the Griffith Observatory trail holds its own wonders.

The marker offers a rare chance to be in four U.S. states at once, though there's some controversy over its geographic accuracy.

A statue high in a hill that represents how Buffalo Bill got his name.

When zealous marijuana enthusiasts kept stealing the "Mile 420" highway marker, the State of Colorado got creative.

This Boeing KC-97 tanker is now a restaurant for aviation lovers.

The superstar of Cold War nuclear bunkers has been featured in countless films but is now barely operational.

Hidden beneath a bridge, this waterfall is known for the large amounts of graffiti painted on its base.

These faux-cliff dwellings allow visitors to climb around on a replica archaeological site.

The strikingly modern structure stands out among the brick buildings speckling the Harvard Business School's campus.

This is the house that spite built.

A steampunk wonderland that preserves America's history of industrial innovation.

Once the largest public hospital for the mentally ill was also surrounded by controversy.

Take a dip in the world's largest mineral hot springs pool.

Even in death, he's still your huckleberry.

This interpretive path lets you get up close and personal with dinosaur bones.

One man has installed bathtubs into the Utah desert floor to harness the powers of a natural hot spring.