This immigrant bridge once spanned the Thames but is now a fixture of an Arizona city.

The highest dunes in California are the most likely place in the area to hear the Singing Sands.

This giant temperature attraction created some giant electric bills.

Finally the worlds of UFO enthusiasts and beef jerky lovers have come together in this roadside shop.

The self-proclaimed gateway to the Extraterrestrial Highway.

The most magnificent bottle house in a town strangely full of them.

In the middle of an extremely unforgiving and desolate high desert is the most secret military facility in the world.

These markers are used to determine the ground stability of the Strip.

Fans have made a utility pole near where the 90s musician was shot into an ersatz memorial.

A cosmic pit stop just beyond the notorious Area 51.

A graceful natural rock formation stands astride the point where the Gulf of California meets the Pacific Ocean.

A statue representing a lost Roman profession that was vandalized for centuries.

This ancient market is often referred to as the oldest shopping mall in the world.

Legend has it that this bronze orb, which sat atop an ancient Egyptian obelisk, once held the ashes of Julius Caesar.

This ancient Roman prison is decorated with an upside-down cross not as blasphemy but as saintly tribute.

A mysterious chasm in the heart of the ancient Roman Forum, the Lacus Curtius was once believed to be a gateway to hell.

An ancient Roman temple first dedicated to an emperor's wife is now a church.

St. Francesca Romana, patron saint of drivers, resides in the church she founded.

The only remaining arch of the oldest stone bridge in Rome stands in the middle of the Tiber.

A burial vault located under Tiber Island in the middle of the Italian capital.

This is the oldest Roman-made bridge in the city still existing in its original state.

A square-domed symbol of resilience in the heart of the old Jewish Ghetto.

Descend 2,030 years into the past in an ancient tunnel built to support Jerusalem's most famous wall.

The only quarter of the Old City not dedicated to a major world religion.