San Francisco's newly reopened hands-on science museum.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

These delicate buggers are some of the rarest fossils that have bubbled up from the Tar Pits.

A traditional American farmhouse plopped in the middle of a Piccadilly courtyard.

This hidden rooftop garden in downtown London offers a quiet respite from a bustling city.

The Great Fire of London and the regulation of one-way streets both started in this alley.

This Underground station has been a popular filming location for decades, even before it closed.

These wire animal sculptures commemorate the exotic inhabitants that once called the Tower of London home.

The medieval woodcut-style artwork chronicles life in medieval London.

A celebrated bandstand at the center of what was once the worst slum in London.

The pockmarks across the building's facade are remnants of the Blitz.

A building that survived WWII, possibly on the virtue of its name alone.

This innovative steam machine was no doubt the most famous of the pioneer locomotives.

The Art Deco artwork depicts gilded carriers of deadly illnesses.

Its collection includes a broad array of social, geographic, graphic design, and political history.

The fences outside some of South London's estates are made from recycled World War II stretchers.

The commemorative stone column conceals a secret laboratory.

A recently restored Shoreditch landmark with ties to Jack the Ripper.

A portly statue of a golden boy commemorates an unusual cause of the Great Fire of London: the sin of gluttony.

This intricately carved and hilariously huge bed was such a famous symbol both Shakespeare and Byron used it in their writing.

An architectural oddity hides in plain sight on this iconic London bridge.

The Tudor-style cottage in the middle of the square is not quite what it seems.

A measuring mishap led to these artificial stone ladies losing their stomachs.

Originally built for London’s cab drivers, this bright green hut now serves anyone a hot drink or meal.