A moving memorial to the fallen and missing from WWI trenches.

In the shadow of a former battleground, the resting place for nearly 2,000 soldiers who died in World War I.

A 19th-century fortress and collection of artifacts offer a tour of Saudi history.

This mesmerizing, colorful structure looks like a tent made from stained glass.

An archaeological site believed to be the burial place of the "mother of us all."

This mystical orb covered in strange symbols is thought to have been used in ancient Greek magical rituals.

A man's head is enshrined beneath a statue near the first building constructed for the modern Olympic Games.

150 or so scrounged-up lamps, chandeliers, and lanterns light up this alley in central Athens.

Legend says this sacred tree was a gift from goddess Athena.

This striking sculpture of Icarus honors Greece's fallen flyers.

Heralded as the world's first theater, these ruins are often overlooked as they reside in the shadows of the Acropolis.

This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

A 2,000-year-old computer demonstrates remarkable engineering and astronomical precision.

Bizarre living fossil only grows in a small chunk of the Namib Desert.

A public display of prehistoric space rocks is named for the Namibian village where they were found.

A shining, cold, black organ lies in San Francisco's financial district.

One of the oldest producers of hand-folded fortune cookies still uses its original secret recipe.

Walk or bike along a narrow strip of Belgium sandwiched by German territory.

A distinctive former power plant turned university lecture hall looks like it could make you breakfast.

This bakery and museum offers tours of the tastes and mythology of Aachen's signature spice biscuit—just don't ask for the recipe.

Albert Einstein's head sticks out of a snail shell stacked on a rocket in this truly bizarre monument to the scientist.

The world's tallest church tower reveals a spectacular view to anyone up to the task of climbing the daunting staircase.

The oldest surviving wooden bridge over Rhine lets travelers cross easily from Switzerland to Liechtensten.

This stucco building in North Africa was the first American-owned property on foreign soil.