An unexpected sinkhole in a desert flat within Gold Butte National Monument.

A glass display case holds the document that ended the Second World War—which one person signed on the wrong line.

The oldest Naval chapel in the United States is home to an incredible collection of Tiffany stained-glass windows.

The last water-powered beam pumping engine in Britain.

The former home of the army detachment that captured Geronimo.

This tower once served as a radar station during the Cold War.

The rocks around this mountain are filled with so many carvings that the area became known as the "open library."

A burial ground for workers at one of Hawai'i's largest sugarcane producers that laid buried for decades.

One of the country's best automotive museums and home to one of the first motor vehicles.

More than 100 monumental tombs carved into rock are preserved at this ancient Nabataean site in the Arabian Desert.

Lions carved into the rockface adorn these two tombs built into the mountains of Dadan.

The metal leaves on this tree are engraved with the names of Holocaust victims.

An interesting look into 18th-century American history.

An institution dedicated to the towering buildings that make up skylines in New York City and around the world.

The secret meeting held in this building would forever change the world.

A triumphant marble and bronze fountain depicting a 15th-century Hungarian king and his hunting party.

One of the few remaining indigenous petroglyph sites in Nevada.

The history of drinking is told through 1,800 cups, chalices, and glasses at this exhibit.

A towering tribute to decisiveness stands on the spot where Brigham Young and his followers decided that this must be the place.

This unique bridge is one of the last of its kind in Sweden.

Take an underground boat ride through a former hydraulic raceway that was built in the late 19th century.

At more than 5,000 years old, these structures are among the oldest free-standing stone buildings in the world.

A monument to a Polish general who fought the American Revolution and became the "Father of the American Cavalry."

This sculpture honors the man who was known as the "Righteous Among the Nations."