Where condemned pirates met their grisly end at the gallows on the River Thames.

The 2,000-year-old beam is tucked within the pedestrian entrance to the old London Bridge.

This mundane post marks the old location of the city's main postal hub.

The Scottish Reformation leader's grave was paved over and is now a parking lot.

This 16th-century house tells the city's history through old artifacts and quirky tales.

A series of three shiny letters mark the boundary of an old refuge for those being pursued by debt collectors.

Overlooking the burial ground is a tower designed to prevent thieves from snatching the recently deceased.

The fantastic charm of England's oldest botanical garden has made it a place of writerly inspiration for centuries.

The spot where three Protestant clergymen were burned at the stake during the reign of "Bloody Mary."

An American ghost town hides along a side street in Scotland's capital.

This stack of stones honors a murdered 18th-century woman.

This macabre masterpiece of a mural is one of Francisco Goya's "Black Paintings."

A lush indoor jungle fills this bustling Madrid transportation hub.

This sweet-toothed bear searching for snacks has been a symbol of Madrid for decades.

A grave marker depicting a body snatching tableau on a 19th-century tombstone.

Legend says this rock was once a chopping block for public executions.

The lighthouse central to the 1980s horror classic "The Fog" is, in fact, located in one of the foggiest areas of the Pacific Coast.

This king penguin is a knighted brigadier of the Norwegian Army.

A charming 17th-century alley is lined with secondhand bookstores and antiquarian shops.

These magnificent city walls rise from the barren sun-baked Spanish plains like something straight out of a fairytale.

A mysterious carving from 17th-century London seemingly depicts a young boy sitting on a bread basket.

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

Perhaps the tiniest sculpture in Saint Petersburg is a little bronze finch inspired by a song.

This otherwise ordinary close on the Royal Mile constituted the end of the world for Edinburgh’s poorest residents.