The installation’s official name, “You Who Are Getting Obliterated in the Dancing Swarm of Fireflies,” says it all.

Rome's ancient Etruscan rival, now a park full of ruins.

Whitewashed mosque contains the world's largest carpet.

The birthplace of Karl Marx is now a museum dedicated to the communist revolutionary's life and work.

The largest bell in the world has been swinging high above a Cologne cathedral for almost a century.

Sitting in the basement of a castle, the largest wine barrel in the world is bigger than most apartments.

A geological mystery on Camelback Mountain.

There must be a pun in this haystack somewhere...

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

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

This bridge was constructed from the rubble of the infamous Bastille.

A spiritual vortex among the red rocks in Sedona.

Scattered throughout London are ancient remnants of the city's former bounding wall.

A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.

Breathtaking and huge 430 year old maps of Italy.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

A wall of chewing gum moonlights as collective art.