One hundred years ago this small house in downtown Zürich became the birthplace of the Dada movement.

This monument is dedicated to Balto, the heroic Alaskan sled dog.

Curious crustaceans support an obelisk from ancient Egypt that now stands in modern-day Central Park.

This sculpture by artist Fritz Keonig survived the 9/11 attacks and now stands as a monument to the victims.

Possible relics of the ancient Roman city are hidden in this restaurant's façade.

The only surviving piece of a submarine said to be the most decorated vessel in U.S. history.

10,000 flowered plants bloom in the City of Roses.

On East Burnside, a 24-hour vending machine distributes world-class pastries.

A sprawling cave network created by a lone lava tube.

Spectacular volcanic cliffs along the Crooked River invite hiking, rock climbing, and photography.

The original span of a high bridge across the deep Crooked River Gorge has been preserved for pedestrian use.

The world's last remaining store of its kind.

This curious, round temple is the oldest still-standing marble building in Rome.

Breathtaking and huge 430 year old maps of Italy.

Historic fortifications form the boundary of Vatican City, but it’s not entirely surrounded by walls.

A master of trompe-l'oeil creates a stunning, tourist-fooling dome out of a flat ceiling.

This former Roman Catholic Church still contains the embalmed hearts and organs of 22 popes.

Romans decided this 16th-century "talking statue" was so ugly, they named it after a primate.

A treasure trove of Renaissance-era funerary art in a Roman church built on top of Nero's grave.

The ruins of the largest gladiatorial school in Rome are largely hidden under modern streets.

These hut foundations are believed to be the residence of Romulus, founder of Rome.

In the past, Renaissance sex workers were encouraged to entice customers on this bridge.

Study the Alien etchings in this fountain while you refill your water bottle.

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