Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

The last remnants of a massive medieval wall that once encompassed the city of Berlin.

A monument to the three wars that led to German unification towers within a Berlin traffic circle.

Tiny memorials honor individual victims of the Holocaust.

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

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

St. Mary's features one of the most spectacularly decorated cathedral interiors in all of Europe.

Beneath Kraków Old Town's main square lies a hologram-filled medieval market vampire graveyard wonderland.

This Polish cave has housed a dragon, a brothel, and an enduring legend.

Real bones which are said to have belonged to a Polish dragon.

The enormous 250-room Vanderbilt mansion conceals hidden doors and secret passageways.

This bridge is haunted by the ghost of a distraught mother.

Carrying on the legacy of a short-lived experimental school tucked away in the mountains of North Carolina.

An early life spent in this "Old Kentucky Home" inspired the writings of North Carolina's most famous novelist.

Every week, a festive public jam session breaks out in downtown Asheville.

A museum dedicated to the legacy of Bob Moog and his pioneering synthesizers.

This North Carolina museum is keeping the pinball craze alive, with a little Space Invaders on the side.

The biggest exposition of dental equipement in Europe. And a Mummy.

The only Bahá'í house of worship in North America and one of only a handful worldwide.