If a glacial river suddenly diving into a sheer chasm via a dramatic, multi-stage waterfall isn't peak Iceland, it's certainly close.

This eye-popping Icelandic crater lake is surrounded by red volcanic rock.

The picturesque birthplace of Icelandic democracy is drenched in the blood of its brutal past.

Medicinal spa created with the discharge from a geothermal energy plant.

Walk in the footsteps of the gods and straddle two tectonic plates.

A museum dedicated to the history of a terrifying secret police is now held in their former headquarters.

Germany's Glienicke Bridge has a shady history of clandestine meetings, espionage, and spycraft.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.

The site of a concentration camp where inmates were made to take part in one of the largest counterfeiting operations in history is now hauntingly empty.

This German version of Universal Studios holds a vault of treasures from the NeverEnding Story.

Walk inside a half mile long crevice right outside the town of Garmisch Partenkirchen.

The fairy tale castle of the "fairy-tale king."

One of Vietnam's most iconic landmarks was built by Japanese traders and is now in danger of sinking.

This Cambodian riverbed is covered in ancient Hindu carvings both above and below the waters.

This French colonial post office is arguably the grandest in all of Southeast Asia.

A memorial to the monk who set himself on fire to protest the persecution of Buddhists in Vietnam.

A nightmare for the claustrophobic lies hidden in Southeast Asia.

Monument to a brutal, ineffectual US bombing campaign and a sobering reminder of the human cost of the Vietnam War.

This colossal war machine is now a living museum dedicated to underwater warfare.

Hauled from the water's depths, Henry VIII's flagship is preserved in this capsule-shaped museum.

While most wind tunnels test scale models, the "Cave of Winds" was large enough for actual airplanes.

The actual model from the original "Star Trek" series is now on display at the National Air and Space Museum.

The "lovely red Vega" of the legendary record-settling pilot.