The 570-ton boulder that gave a New Jersey town its name.

A Syrian family keeps memories of their homeland alive at this sweet shop.

The bridge that cost Germany a World Heritage Site.

A historic and beautiful Art Nouveau chamber in a historic railway station.

Steadily reminding Czechia of its past.

An existential riddle in the world's largest ancient castle.

Synagogue built from the stones of Solomon's temple contains the golem of Prague.

A 400-year-old mummified arm dangles from the ceiling of St. James the Greater, serving as a warning to thieves.

Two stunning 17th-century libraries and a cabinet of curiosities.

The slender brass strip in Prague's Old Town Square was used to tell time from 1652 to 1918.

Macabre astrological automaton clock dating to the late 1400s.

This spooky statue sits outside a famous Prague theater.

A moving and macabre World War I-era painting by the great artist Otto Dix.

In addition to fine dairy products, the world's most beautiful milk shop also offers a feast for the eyes.

A small hippo-shaped fountain in Berlin, Germany.

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.

A spitting ode to a German serial killer.

This impressive collection of rare books on ancient mysticism inspired author Dan Brown.

Famed for its pie, this eatery has a hidden tunnel that allowed Catholics to secretly walk to church during the Reformation.

An Amsterdam street lined with antique shops each one dedicated to a different obscure collection.

Amsterdam's narrowest house facade is a monument to 17th-century tax evasion.

Three connected pink triangles memorialize persecuted gays and lesbians throughout history.

Established in 1638 to battle the Black Death, this botanical garden is a treasure trove of rare flora.