These ornate arches show how the course of the River Thames has changed.

An agreement meant to honor the Duke of Buckingham led to this unusually-named passageway near Charing Cross.

An unusual ode to the late Irish playwright, complete with a squiggly bust and coffin-shaped bench.

Behind a bodega is a small museum of relics and ephemera showcasing the history of New York.

The anatomical-pathological collection of a man who changed surgery.

Soon after its unveiling, this giant inverted globe sparked controversy and was vandalized.

Buried for centuries, this hidden cellar is all that remains of London's medieval Whitefriars Monastery.

A mysterious pair of mice eating a piece of cheese is London's smallest public sculpture.

A 300-year-old tea shop that brought tea to the English people, not to mention the Queen herself.

A pair of club-wielding guardians stand watch over London's first public clock to feature a minute hand.

One of the few remaining examples of 19th-century London’s attempt to clean up its reputation.

The fierce beast perches atop a pedestal marking where the historic City of London gates once stood.

This pub was 238 years old when it decided to revamp its image: It started serving Thai food.

This ancient Egyptian obelisk still bears the wounds of World War I.

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

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

A 1950s beatnik coffee house, turned 60s counterculture hotspot, turned modern music venue.

The commemorative stone column conceals a secret laboratory.

This pump on the bad side of Victorian London betrayed a horrifying revelation about the water supply.

This legendary stone is of unknown origin, and throughout history has been a literal touchstone for British leaders.

After nearly 60 years, there's still a bear at Paddington Station looking for help.

One of America's founding fathers lived in this London lodging between 1757 and 1775.

The Paul Bunyan of the steel industry.

A steeple in the shape of a golden hand pointing straight up commemorates Zebulun Butler, the first full-time pastor of this Mississippi church.