This crumbling stump is all that remains of what was once thought to be the oldest living organism.

The longest living non-clonal organisms on Earth.

A poignant mural honors the heroic teenage non-conformists who took on the Nazis and paid the ultimate price.

A poignant museum dedicated to the history of the Dutch resistance against Nazi occupation

A memorial in the Tiergarten is a reminder of the suffering inflicted on homosexuals by the Nazi regime.

Take a step into the workshop where Edison and his employees revolutionized the world.

The largest United States military cemetery overseas.

This medieval castle is filled with an eccentric collection that ranges from ancient Egyptian artifacts to taxidermy to a mummified hand that was cut off during a duel.

A somber memorial to the seven victims of a horrible crime.

Thomas Edison's home and final resting place also boasts an impressive garage, where some of the earliest electric cars are on display.

This monument gives insight into how lost children were found in Edo-period Tokyo.

A moving tribute to a leader of the American abolitionist movement.

In the city forest of Augsburg are oval, artificial ponds formed from a World War II bombing campaign.

Hidden in Portland’s West Hills, a 170-year-old marker literally stakes out the Pacific Northwest.

This supermarket offers shoppers a window into the past alongside their groceries.

The final home of the most famous horse of the American Civil War.

The only U.S. Senator to die on the field of battle is buried in San Francisco but memorialized at Balls Bluff Regional Park.

During World War II this was the site of an "honor camp" used as a prison for draft dodgers, Native American conscientious objectors, and Japanese-Americans—including a man who brought his case against the camp to the Supreme Court.

One of Gettysburg’s least visited battlefield memorials is off the beaten path, but worth a visit.

Constructed in 1676, this stone memorial is believed to be the oldest veteran's memorial in the United States.

The oldest military monument in the United States.

An enormous Soviet aircraft, the only one of its kind, stands at the deserted shore of the Caspian Sea.

A dozen U.S. presidents have stayed at the historic resort, which was known as James Buchanan’s “Summer White House” from 1857-1861.

The world's oldest soul food restaurant is also one of its best.