Roman ruins top white travertine terraces formed by ancient hot springs.

In this historic region, homes and churches are carved into ancient volcanic rock formations.

Mysterious lost empire of the Silk Road.

The world's oldest map of the holy land gives us a fragmented glimpse of the layout of biblical nations.

An ancient capital city that dates back 3,000 years old and harbors many surprises.

This historic covered bridge contains a series of macabre paintings that communicate one thing: everyone dies.

This memorial commemorating fallen Swiss Guards of the French Revolution has been called the saddest stone in the world.

This 170-year-old Swiss guesthouse built into the side of a mountain is best accessed by a cable car.

A whimsical bridge adorned with decorative dragons.

This one-time health resort was used by aristocrats around the world.

These historic defenses ensured the city within would survive hundreds of years of occupations, sieges, and invasions.

The palace window through which Protestant nobles flung two Catholic regents, thus sparking the Thirty Years' War.

The tunnel's elegant proportions keep you snug with no claustrophobia freak-out.

This tipsy office building in downtown Prague was originally called “Fred and Ginger.”

Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.

Macabre astrological automaton clock dating to the late 1400s.

Gargoyle head that brings good luck.

A musical instrument played by the sea.

A chain of 16 wondrous lakes formed as a result of the gradual dissolution of soluble layers of bedrock.

A number of craters left by fatal mortar strikes have been filled with red resin to remember those lost during the Siege of Sarajevo.

Bridge that died in war and was resurected.

Meant to be a lavish presidential home, the palace became a symbol of the fall of South Vietnam.

Artifacts and memories from the Vietnam war, located in a place that experienced it first hand.

Ho Chi Minh's perfectly preserved body has been on display here since 1975.