It houses the remains of a 17th-century version of the Titanic.

An abstract monument to a symphonic composer.

The Guardian of Tallinn.

The world's most remote permanent settlement on an active volcano.

This statue was given to France by the United States to commemorate the centennial of the French Revolution.

A replica of the first public theater built in California.

Before it was abandoned and left to rust alongside the road, this riverboat starred in a John Wayne movie.

Art Deco stylings conceal the true nature of this bridge.

Also known as "Robin Hood's tree," this tree became a famed location along Hadrian's Wall before it was cut down in an act of vandalism.

This temple was constructed entirely by Roman soldiers.

Local legend says Isaac Newton built this footbridge without any screws, bolts, or nails.

This tree was grafted from the actual tree that led Isaac Newton to ponder the theory of gravity.

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

Countless grotesque faces stare out from this eerie Prague art wall.

From here, the loch appears to take the shape of mainland Scotland.

The spot in the Mile-High City that's exactly 5,280 feet above sea level (at least for now).

Heralded as the world's first theater, these ruins are often overlooked as they reside in the shadows of the Acropolis.

This Czech church doubles as something of a permanent fashion exhibition for a statue of the Infant Jesus.

A turn of the century building boasting some of the most beautiful art nouveau architecture in Prague.

This tipsy office building in downtown Prague was originally called “Fred and Ginger.”

Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.

Macabre astrological automaton clock dating to the late 1400s.

This theatre was made famous after Lee Harvey Oswald was captured inside watching a film.

This collection of bronze hands comes from astronauts, presidents, baseball greats, and more.