This central Nevada cave is the spiritual home of ancient and enigmatic pictographs.

This Old West eatery along America's Loneliest Road was originally a stop on the Pony Express.

This rest area is also home to a remarkable petroglyph site.

Officially named the "Loneliest Road in America," this barren stretch of Nevada road offers almost nothing but sky and open fields.

This railroad magnate's 19th century tower is more than a little bit out of place in the Nevada desert.

Only intact Ichthyosaur skeleton in the United States and an abandoned gold mine and ghost town all in one place!

The only United States mine for magnesium carbonate has been operating continuously since the 1930s.

A hidden courtyard houses early 20th-century plaster masterpieces.

A hidden gem, named after a San Franciscan icon, offers spectacular views of the Pacific Ocean.

This once bustling boomtown hotel is now the hottest spot in Nevada for ghost hunters.

Get a taste of the Wild West and a glimpse into the gold rush in Goldfield's oldest continually-running business.

The spot in the Mile-High City that's exactly 5,280 feet above sea level (at least for now).

The world's largest outdoor organ is played weekly by one of just two civic organists in the U.S.

These official units of measurement—including chains and perches—lie hidden beneath tourists' feet in a popular London hub.

This massive solar generating facility in the Nevada desert has been plagued by difficulties.

Concrete strongholds stand guard over the Golden Gate.

A living time capsule of the 1960s Richardson Bay water-front.

A working model of the entire San Francisco Bay and much of the Sacramento River Delta, complete with regular tides that change every 14 minutes.

A Norwegian-born sculptor created these soaring guardian angels at the entrance to Hoover Dam.

The longest living non-clonal organisms on Earth.

Decor at “Nevada’s Oldest Thirst Parlor” includes Raquel Welch's brassiere hanging from a stuffed moose head.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

The tallest bridge in California was constructed for a project that was eventually cancelled.

A colossal floating restaurant built to look like a ancient Chinese imperial palace.