The tallest freestanding structure in the United Kingdom.

This beautiful deer park was built so King Charles I and his court could go hunting while escaping a deadly plague outbreak.

London's marvelous wildfowl reserve along the Thames.

The house in the middle of the motorway.

An ancient Roman temple first dedicated to an emperor's wife is now a church.

This curious, round temple is the oldest still-standing marble building in Rome.

The remains of this 2nd-century Roman temple are incorporated into a modern building.

This plaque commemorates an amazing 19th-century sea rescue.

The recreated ruins of a house designed to memorialize a World War I shelling on the town.

This library dates back to the late 17th century and was one of the first public lending libraries in England.

These remarkable cascades are the jewels of Upper Tees.

This building was once a town hall, a fire station, a prison, a dairy market, and the target for two marksmen.

An abandoned tower once used to study the cosmos hides within a thicket of greenery.

This celebration of Latvia’s freedom and independence avoided demolition over half a century of Soviet occupation.

This sculpture marks the spot where one of the greatest Roman rulers was proclaimed emperor.

The reconstruction of this prominent building fulfilled a long-written command.

The oldest church in Serbia was also the ecclesiastical seat of the region during the Middle Ages.

Hidden beneath the streets of London is a secret subway that only carried mail.

This subterranean oyster house has been the pearl of Grand Central Station since 1913.

This Manchester laundromat is hiding something.

Despite having a dome made of papier-mâché this tiny observatory has survived for over a century.

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

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

The castle still holds traces of the abandoned Roman fort it was built atop.