A 2000-year-old Roman amphitheater lies just below Guildhall Yard.

An unusual round church in London with a Templar past.

The television series' iconic giant foot was borrowed from this classical painting.

This bronze statue was erected to honor a small Scottish town's beloved stray cat.

The bears of Bern have been a city highlight for over 500 years.

One of the few standing Roman lighthouses and a labyrinth of tunnels are a couple of the secrets at this historic castle.

The first botanical garden, a feather in the cap of the Grand Duke of Tuscany.

Established in 1638 to battle the Black Death, this botanical garden is a treasure trove of rare flora.

The de facto symbol of Copenhagen is this bronze fairytale which cannot seem to keep its head for very long.

The old observatory in Copenhagen has a spiral corridor used as a racetrack.

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

Scattered throughout London are ancient remnants of the city's former bounding wall.

Catacombs turned marketplace.

Eighty million natural history specimens call this gargantuan museum home.

A museum based on the collection of a Victorian family. Housed in a remaining Victorian villa.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the first ‘Harry Potter’ film.

This iconic 1,000-year-old medieval castle is a favorite of the film industry, most notably as the location for Hogwarts in Harry Potter.

London's last remaining public soapbox site has seen speeches from Karl Marx, Vladmir Lenin, and George Orwell.

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

The oldest house in Glasgow is now a museum dedicated to the city's medieval history.

A 18th century graveyard and its astonishing cortege of macabre iconography.

The true age of this ancient stone circle is unknown, but its stunning vista isn't in question.

Possibly the oldest of Britain's ancient henges is also one of its most stark.

This charming English house was once the home of England's most famous poet.