This museum inside a museum tells the story of London's timepieces.

A silly medieval mural preserved on the side of a Viennese house.

Baroque celebration of the end of the Great Plague of Vienna.

Op-art architecture designed for happiness.

A small museum filled with over 1,000 clocks, and one particular clock calibrated to run until the year 9999.

Legends surround an ancient tree trunk riddled with nails for good luck.

Cold war icon and onetime "hole" in the iron curtain.

Metro station with a claim to rock n' roll fame.

A narrow passage next to a cafe leads to a courtyard exploding with murals, tags, and paste-ups.

100 massive sculptures in the Hudson River Valley.

Why have you never heard of the second most popular tourist site in New York?

Dedicated to the art and science of glass in equal measure, this space is as much laboratory as museum.

Former villa and estate of James Deering developed to preserve native tropical forests.

Started as a kitchen garden, now the second largest botanical garden in the world.

An interesting decoration on this historic site, this weathervane comes with as many legends as it does questions.

The massive machine creates cracking displays of indoor lightning.

A former waterfront market is now in the center of town due to some interesting Boston engineering.

America's original house of worship for Spiritualism, the religious movement based on communing with the dead.

Mrs. Mallard and her brood are a beloved fixture in Boston Public Garden.

This massive tea kettle was once a promotional stunt for the Oriental Teashop.

Berthed at the Charlestown Navy Yard in Boston, "Old Ironsides" is the oldest commissioned warship still afloat.

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

Two thousand artifacts from around the world collected by one woman who loved to travel.

This peaceful Massachusetts graveyard was one of the first "garden-style" cemeteries in America.