An eatery for UFO seekers on the Extraterrestrial Highway.

This sign designates the road that leads to the infamous Area 51.

The self-proclaimed gateway to the Extraterrestrial Highway.

Mysterious meeting place for UFO hunters near Area 51.

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

An exotic wildlife habitat right off The Strip.

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

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."

Remarkably realistic Florida shoal bass "swim" inside this large globoid sculpture.

A building so large that it has its own weather.

This museum started as a collection of Manhattan Projects and continues to add exhibits as they are declassified.

These strange carved boulders in a forested canyon resemble tiny stone villages.

The headquarters of one of the world’s longest-running humor magazines bears a noticeable resemblance to a head wearing a Prussian helmet.

This plaque commemorates the call between Alexander Graham Bell and Thomas A. Watson.

This nearly endless university hallway is home to a unique sunset known as "MIThenge."

MIT students continue the legacy of beloved professor "Doc" Edgerton through learning by doing.

This bridge was the birthplace of a unit of measurement based on a fraternity joke.

A men’s restroom became a sandwich shop.

Mrs. Mallard and her brood are a beloved fixture in Boston Public Garden.

Statue commemorating the use of ether in anesthesia.

A beacon atop a downtown building provides Bostonians with weather forecasts and baseball news.

Painstakingly built dioramas sit unnoticed in a Boston office building.