Lovers proclaim their unbreakable bond by leaving their names on locks fastened onto the Shoreditch fence in East London.

A plaque hangs near the execution place of the Scottish Independence leader famously depicted in "Braveheart."

A network of concealed passageways lies within a busy London Underground station.

This 1920s Dutch barge is now a floating bookstore.

Wedged between two buildings at the Great Ormond Street Hospital is this secret music installation.

The celebrated eyesore created by starry-eyed sweethearts.

Claude Monet was baptized in this lavishly ornate Paris church.

A mud statue stands in the dark tunnels, seeming to hold up the weight of the city above.

This life-size replica of the Statue of Liberty's flame is also a tribute to Princess Diana by default.

How did a French journalist’s grave become the sexiest statue in the cemetery?

Medieval museum built over Roman baths that features famous tapestries of a lady and a unicorn.

France's national museum of scientific and industrial instruments.

France's most famous cemetery, with some of its most curious tombs.

Thousands of crosses and markers for soldiers who lost their lives in Iraq and Afghanistan blanket a California hillside.

A cozy bookstore is tucked within an old gold mine shaft beneath the cafe and ice cream shop.

The Empire Mine is "one of the oldest, largest, deepest, longest and richest gold mines in California."

Its dark depths conceal millions of rare, delicate crystal formations.

This museum boasts the ninth-largest collection of insects in North America.

Seven ceramic sculptures are scattered around this California college campus.

Special tunnels built so that frogs won't be killed when crossing the highway.

Dentist's hated concrete colossi are now beloved icons of the community.

The California capital city once stood 10 feet lower than it does today.

A replica of the first public theater built in California.

This 19th century train workshop is a treasure trove of railroad history.