A lovely park home with a few interesting guests.

An old railroad grade built for the construction of Hoover Dam is now a recreational trail featuring several tunnels and sweeping views of Lake Mead.

These markers are used to document elevation changes around the famed dam.

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

Experience a charming 1930s version of "infotainment."

This former lieutenant governor's home is brimming with curiosities.

A luxurious doomsday bunker hidden beneath an unassuming Las Vegas home offers the best of subterranean suburbia.

Formerly the world's largest, this Willy Wonka-esque contraption runs 24/7.

A tiny slice shop hides down an unmarked hallway in a Las Vegas casino.

An exotic wildlife habitat right off The Strip.

An overlooked monument to the celebrity gangster who helped put the sin in Sin City.

One of the world's tallest Ferris wheels takes visitors high above Las Vegas in a spinning party room.

Once damaged by Hurricane Agnes, this bridge is now on the National Register of Historic Places.

A star fort along the C&O Canal in western Maryland that protected America in three wars.

After an Illinois church was struck by lightning and burned down, Frank Lloyd Wright designed this replacement.

A source of civic pride, though the reason for its construction is unknown.

What may be America's largest classic video game arcade lurks inconspicuously in a Chicago suburb.

The site of the house Jack Parsons made famous both in life and death.

A rare surviving example of a pre-WWII Japanese garden, restored after years of neglect.

Pasadena glamour turned government issue.

Originally the home of chewing gum mogul William Wrigely Jr, it is now the official offices of the Tournament of Roses.

A repository of Pasadena history.

A Bicycle Path in the Sky.

The space-age building is home to one of the few remaining rotating restaurants in America, and the only one that inspired a 1980s sitcom.