Built as part of a "sludge fleet" that transported sewage, this historic steamship now mostly moves people.

Now a memorial to merchant sailors and Titanic victims, this medieval church was destroyed by bombing raids in 1940.

This 700-year-old storehouse was a POW jail, aviation workshop, and Titanic memorial before becoming a brewpub.

A half-mile-long stretch of medieval forts built after a devastating pirate attack persists amid the modern port city.

A bright little alley in La Boca is a part of tango history.

Museum housed in underground tunnels that date back to Buenos Aires's earliest settlements.

A rare underwater observatory in the Caribbean that provides breathtaking views of vibrantly colored aquatic life.

The final resting place of the liberator of Argentina is guarded around the clock by two soldiers.

A tower devoted to — and modeled after — the Divine Comedy.

A gateway to a mysterious network of underground tunnels.

Buenos Aires' city of the dead contains some very famous remains, including Eva Perón.

A pocket of serenity in hectic Buenos Aires, complete with a peaceful courtyard and massive library.

Xul Solar was an artist of alternate worlds, inventor of languages, and dreamer of utopias.

This historic, palatial theater is now one of the world’s most beautiful bookstores.

Thousands of migrating monarchs overwinter clustered amongst the eucalyptus trees.

The bar where "The Great Train Robbery" was planned was once a nexus of high society and low morals.

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.