Murals of the wild parties once held on the frozen River Thames.

The site of London's first coffee house has been serving refreshments of one kind or another for 360 years.

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

The commemorative stone column conceals a secret laboratory.

Near the site where the English Archbishop was born, you can find an emblem in the shape of a pilgrim's badge.

Public access to clean drinking water was an instant hit among the masses.

London's only public statue of the much-married monarch adorns the gate to St Bartholomew’s Hospital.

The ruins of a church destroyed by both the Great Fire of London and the Blitz, now turned into a peaceful garden.

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

Mysteriously stacked storefront paths give this medieval British town an iconic style like none other.

This stone once marked the boundaries of Liverpool's medieval markets.

The tower was originally used as a chimney for the waste incinerator of St. John's Precinct and Market.

This grand old 80-foot sequoia towers above the buildings in the city’s retail center.

The first park built over a freeway is a brutalist masterwork.

Allowing humans and fish alike to migrate from freshwater to saltwater and back again.

A young botanist's horticultural vision realized through a lifetime of planting, tending, and collecting seeds.

This Seattle store is packed with all sorts of curious creatures and creations.

Statue of Lenin, from Cold War era Czechoslovakia, now in a neighborhood of Seattle.

Seattle's super-sized cowboy apparel once belonged to a themed gas station that wrangled in herds of tourists.

This historic building provides a powerful glimpse into the lives of Japanese Americans forced to relocate during World War II.

The tech giant built three enormous glass orbs in Seattle so employees could work inside a rainforest greenhouse.

This former coal gasification plant found a curious second life as a popular public park.

A giant Troll lurks under one of Seattle's oldest bridges.

In the parking lot of a fast food restaurant, a statue memorializing a prolific bull elephant.