The great Danube river starts here.

Of course the grave of JFK's assassin is surrounded by conspiracy theories.

No telescopes, no power, no gift shop: The Observatory of Chichen Itza, one of the world's oldest observatories, takes astronomy back to basics.

The medieval castle built as headquarters for the Pope's secretive Knights Templar.

Walk through Czech history in Prague's largest graveyard.

Ornate limestone building now filled with geologic specimens, and more.

Mirrors and glass shards cover every inch of this arrestingly beautiful mosque.

A sobering account of the vibrant multicultural neighborhood that was destroyed under apartheid.

This beautifully designed star-shaped fort was the premier defense system of the late 1500s.

When Motown musicians came to Nashville in the 1960s they stayed at this historic record-pressing company because hotels wouldn't host them.

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

Who is this marble man, perpetually creeping up the steps of his own mausoleum?

Certain traditions prevail on the least-visited island of the Aran Islands.

Of the many chalices in the running for the Holy Grail, this one in Valencia Cathedral sure looks the part.

Ukraine's oldest operating pharmacy now offers guests a fascinating walk through apothecary history.

A statue commemorate Tommie Smith and John Carlos's brave protest at the 1968 Olympics, a watershed moment for civil rights.

Eulogizing an unknown man's unusual demise.

The bust of Romania’s most notorious ruler, Vlad Dracula aka "Vlad the Impaler," keeps watch over the ruins of his medieval court.

This painted Lego bridge is the product of over a century of locomotive history.

Sleep in a climate-controlled plastic bubble for the night.

The abandoned "Red Star Train Graveyard" is the final rusting place for precious artifacts of train history.

The splendor of this 17th century golden chapel has led it to be called the "eighth wonder of the world."

An elegant Georgian cemetery best known for the grave of the little girl whose murder on Christmas Day remains unsolved.

How would you like to dine in the same room where some of the Titanic's victims were embalmed?