The curios of pharmacist and collector Henry Wellcome.

A memorial for public executions that dates back to the 14th century.

Hear the quietest sound from across the dome.

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

One of London’s rare Tudor-era buildings is a fate-defying gatehouse for a church.

The London statue that imitates passersby.

This "tower of death" has acted as an observatory, a religious hub, and an executioner's lair.

The Avenue of Mausolea is a series of grand palatial tombs.

England's most famous front door has an accidental doppelganger.

This sculpture commemorates Edinburgh's sister city and their respective celebrity dogs.

A statue in the heart of Edinburgh honors a bear that served in the Polish military during World War II.

This small museum in a 17th-century building honors three iconic Scottish writers.

A quartet of brightly colored mythical beasts stand sentry at this gateway.

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

The John Snow Memorial marks the epicenter of London's 1854 cholera epidemic.

This Great Dunmow pond was a breeding ground for medical leeches, as well as the testing ground for the world's first lifeboat.

The last gas-lit cinema in the United Kingdom, and perhaps the world.

Two stone columns flank the grand Venice square, but there were supposed to be three.

This Venice bookstore has resigned itself to constant flooding by keeping its books in bathtubs and boats.

The only museum with its curator—and her pets—buried inside.

This community on a small Venetian island has taken to painting their houses in bright neon hues.

Formerly known as Saville Theatre, this mid-20th-century entertainment hub includes an ornate frieze.

The oldest known metal-mining site in England dates back to the Bronze Age.

These steps offer a breathtaking view of one of Europe's most besieged fortresses.