The holes in this wall provide a glimpse into Jewish life in Budapest, both past and present.

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

From Austrians to Nazis to Soviets, this historic Budapest fortress has a history as complex as the city itself.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

Museum dedicated to the terror regimes of Hungary.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

A series of caves under Castle Hill that once held the prisoner Vlad Tepes, better known as Count Dracula.

This Budapest bar allows drinkers to leave their mark on the walls, floor, and even ceiling.

This museum promotes informed contraception by documenting its often secret past.

From Ancient Rome to WWII, Neupfarrplatz has over 2,000 years of history underneath its main square.

This riverside restaurant has been serving customers since 1146.

The youngest volcano in Central America.

An enormous, 30-story-deep hole in the middle of Guatemala City.

The remnants of an archaeological camp stand within Tikal National Park.

For this chef, an active volcano is his oven.

This neon blue river gets its color from a unique mix of bacteria and volcano minerals.

Sparkling, calcite-covered skeletons of children who may have been sacrificed to appease an angry god.

A devastated ruin in the south of Belize where British explorers claimed to unearth the Mitchell-Hedges Crystal Skull.

In the St. Francois Mountains in the Ozarks at 1,772 feet above sea level, Taum Sauk Mountain is the highest (and possibly oldest) peak in Missouri.

Read a book with a glass of wine at this classically restored bar.

On the wall of this medieval walkway, a symbol of the Spanish Inquisition.

A statue of a boy looks up at where the famous rival to the Leaning Tower of Pisa once stood.

One of Madrid's oldest trees, with a long and colorful history, resides in El Retiro Park.

Haunting monument to the German Jewish philosopher who died while fleeing fascism.