This remote site in the Australian Outback is where the British government conducted atomic bomb tests in the 1950s.

Memorial to the 89 children killed during the NATO bombing of Serbia.

Somber memorial to the May 10, 1933, book-burning which took place on this spot.

Some say that the battle fought at this Kansas site in 1856 was the first unofficial battle of the American Civil War.

One of the city's oldest pubs displays a skull said to belong to the country's last witch burned at the stake.

The Salvation Army's monument to those who lost their lives in a 1914 shipwreck near the mouth of the Saint Lawrence River.

This ranch house in Jackson's Elraine neighborhood was home to the civil rights icons and the site of a shocking assassination.

Dedicated to the five postal workers who died aboard the doomed ocean liner, this plaque was made from a spare propeller from the Titanic.

A NATO bombing took the lives of 16 civilians in 1999—the ruins remain in the center of Belgrade.

Curated with the cooperation of the passengers and their families, this museum tells the story of the 29 victims and 16 survivors of Uruguayan Air Force Flight 571.

This restored house is like a time capsule of the president's unconventional inauguration.

Despite monuments in other locations, this spot in a South Dakota field is recognized by the U.S. National Geodetic Survey as the center of the 50 states.

George Washington, Alexander Hamilton, and Benjamin Franklin all slept at this humble inn.

The childhood home of the Wright Brothers in Dayton.

Young Emmett Till's tragic story, which sparked America's civil rights movement, is retold near the site where it occurred.

The oldest city park in Walla Walla is home to hundreds of birds, from wood ducks to white peacocks.

The world's first fully-fenced urban ecosanctuary is a haven for New Zealand's rare and endangered species.

This building is a recreation of the gatehouse that separated Los Alamos from the outside world during the era of the Manhattan Project.

Dedicated to extinct passenger pigeons.

One of the three perfect vellum copies of this historic book known to exist is on display in a specially-designed case.

The world's largest collection of historic U.S. military naval vessels.

This small museum inside a larger sports complex honors the first Native American to win an Olympic gold medal for the U.S., and his life of achievement and struggle.

A grueling 699-step stairway to a heavenly view of the island of Saint Helena.

The grounds of former plantations where abolitionist Harriet Tubman spent her youth enslaved are now a museum to her incredible life.