Three hundred years of preserved Spanish colonial history in San Antonio.

Craggy concrete faces are hidden in the walls of this artificial cave along the San Antonio River.

Conflicting markers on its floor tell a tale of two city centers in San Antonio.

Legend has it the commander of the defenders drew a fateful line in the dirt with his sword just before the final battle.

A 131-year-old wunderkammer of Texas history.

This hidden sculpture garden full of Wild West art is one of San Antonio's best-kept secrets.

Two small markers remember the Alamo's feline protectors.

An ivy-covered arch bridge dedicated to Tejano music singer and legend Rosita Fernandez.

A 35-foot-tall fork stuck in the ground outside an office building in Missouri.

Europe's official "zero-level," the equator of elevation.

An ancient passage filled with stalls selling used books, once frequented by Vincent Van Gogh.

The former headquarters of history's oldest megacorporation.

One of Amsterdam's narrowest houses is located right across the canal from its widest.

This historic Amsterdam bar used to accept sailor's monkeys as payment.

The body of at least one victim of a construction accident was left behind in the collapsed pylon, buried under tons of concrete.

This small condiment museum makes all manner of mustards with a 200-year-old mill.

If the tunes of antique organs and musical marionettes don't intoxicate you, the draft beer certainly will.

Thousands of tourists and residents in Cologne affix "love padlocks" on the Hohenzollernbrücke Bridge to symbolize their affections.

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

Every half hour the eye-rolling clock face sticks out its tongue to mock the good citizens of Koblenz.

Among the ostentatious rococo ornamentation of this church, an image of death cuts the life-thread.

Daily jousts and dancing barrel makers in Munich's mechanical clock.

The patron saint of spinsters grasps a container of dried blood.

The footprint of a frustrated devil in Munich's Cathedral.