This Nazi-built amphitheater was constructed on a sacred mountain site used by various German cults.

The bunker where Hitler took his own life is hidden under this deliberately ordinary parking lot.

Berlin's old airport.

The jaw of one of humankind's earliest ancestors on display at an overlooked geology museum.

This city square is home to Amsterdam's oldest church and a statue honoring Dutch sex workers.

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 valley of hot springs and boiling mud pots is home to the record-holding "Geysir," which originated the English word.

This elegant arc of a waterfall marks a religious turning point.

A sulfuric martian landscape that looks far better than it smells.

In Northeastern Iceland lies something of an oxymoron: a steaming desert.

This tumultuous Icelandic lava field looks so alien European researchers want to use it as a stand-in for Mars.

A stratovolcano located in the south of Iceland, with a long history of charted activity and a rich mythology attached.

This beautiful, historic church looks like something out of a simpler past.

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

The unique waterfall in Iceland's south features a backdrop of geometric black lava columns.

The most powerful waterfall in all of Europe.

An encyclopedic collection of mammal penises.

This stunning concert hall has become a symbol of Iceland's national recovery.

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.

Iceland's tribute to its thankless civil servants.

Three columns of volcanic rock shoot out of the ocean.

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

A 200-year-old bar in the historic French Quarter refuses to give up its place in history, nor its role in securing ours.

A pretty park of over 1,600 olive trees that grew from just three saplings brought over from Spain.