A former steam-powered mill from the 1800s is now an industrial park with a giant steel dragon slide.

A beautiful but toxic fountain of mercury.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

Holy Grotto of Montserrat Monastery holds one of Europe's mysterious black Madonnas.

The de facto symbol of Copenhagen is this bronze fairytale which cannot seem to keep its head for very long.

Danish tourist destination well known for open stalls where vendors sell marijuana on the street.

Beneath Denmark's Højbro bridge, a bronze merman and his seven sons forever mourn for the mother and wife who left them for land.

The old observatory in Copenhagen has a spiral corridor used as a racetrack.

Copenhagen's celebrated theme park and gardens.

Despite the groans of archaeologists, this astounding groups of Bronze Age petroglyphs have been painted red for tourists.

A Very Low Frequency transmitter you can tune in on your PC.

This chimerical bridge/tunnel appears to dead end right into the sea.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

A popular European tradition makes its way to the states on one of America's most famous bridges.

Elevated freight railway turned wildly successful urban park.

New York City's smallest piece of private property.

Salute the leader of the proletariat.

This elaborate towering structure was once famed for its revolutionary height.

A building so large that it has its own weather.

A monument celebrating the idea of reaching inaccessible places.

A historic presidential getaway on the continental United States' southernmost island.

An idyllic swimming pool tells the tale of Hemingway's trouble with women.

The former home of the Nobel Prize-winning American writer is now home to dozens of six-toed cats.

Bat house that has only ever housed bat for one night; they all flew away and never came back.