"We Seceded Where Others Failed."

A misnamed well, with a deep dark past.

The place where World War I began.

Oriental bazaar in the heart of Sarajevo.

The museum chronicling a treasure hunter's dream, fulfilled.

Macabre headstones carved with winged skulls, dancing skeletons, and pithy reminders of impending death.

This building holds the embalmed remains of the leader of the Bolshevik Revolution.

A model village fit for an emperor.

The only arched bridge made of stone on the entire Mississippi River.

Hear the quietest sound from across the dome.

The Guardian of Tallinn.

The site of Paul Revere's historic two lantern warning.

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

Stolen goods adorn the organ at Old North Church.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

Copenhagen's celebrated theme park and gardens.

World's largest bell sits on the grounds of the Kremlin in Moscow.

Once one of the world's great cities, Cahokia was a place of religious worship, trade and mass human sacrifice before being mysteriously abandoned.

Quirky castle designed by the American actor best known for portraying Sherlock Holmes on stage.

The final resting place for the remains of 143 Habsburg royalty.

Once home to seven different roller coasters, Glen Echo has undergone many transformations since its founding in 1891.

Largest Roman Catholic church in North America.

At 207 feet, one of the world's longest continuous escalators.

A monument celebrating the idea of reaching inaccessible places.