A remarkable feat of Victorian engineering across the Firth of Forth.

Did the legendary Scottish knight William Wallace actually take refuge here after a major battle?

This monastery built into a cliff hides a perfectly preserved hermit in a glass coffin.

The atmospheric road was never meant to be so creepy.

One room inside this building mesmerizes all with its parabolic dome.

A stunning gilt bronze relief denounced by Hitler as "degenerate art"—even though it was dedicated to the Nazi leader.

Hamburgers are intensely proud of their tunnel beneath the river.

This ornate Weser Renaissance house was also the home of an infamous witch hunter.

A Nazi concentration camp and Anne Frank's place of death.

Striking occult iconography on a medieval German church.

An imperial church bombed to ruins during WWII now stands as a jagged memorial.

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.

Beneath the impressive baroque cathedral that rises from the center of Berlin lies the largest collection of Prussian royals in the world.

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

One of the most well-preserved castles in Italy also contains a rare medieval example of a port fortification.

A small island in Lake Garda that was used as a burial site, pirate hideout, and a monastery.

One of the few guarded stops along the great spice route.

This "Jewish Sistine Chapel" was designed to reinvigorate Judaism's artistic legacy but was almost lost to misguided restoration.

The maze-like transportation hub contains abandoned areas, derelict stores, and a resident bat colony.

Tel Aviv's popular neighborhood went though endless waves of transformation.

Descend 2,030 years into the past in an ancient tunnel built to support Jerusalem's most famous wall.

A "miracle" that seems to produce more holy fistfights than holy revelations.

A patriotic medieval knight in driven-nail armor raised money for widows and orphans of WWI.