One of England's most famous churches hides a pair of little known architectural treasures.

A remarkable medieval structure born from a 14th-century disaster.

Regency-era excess on the English Coast.

This skewed English house has looked like it's going to fall over for centuries.

Scotland's oldest medieval bridge is also among the last reminders of early medieval Aberdeen.

A quiet memorial to those who died saving others in the heart of the City of London.

This silent sentry in the crypt below a large Gothic cathedral is often knee-deep in water.

The colorful stairs are made with marble from the world's major quarries.

This logic-defying 16th-century Tudor manor still stands to the delight and astonishment of onlookers.

Its collection includes a broad array of social, geographic, graphic design, and political history.

The oldest residential street in Europe also features an optical illusion.

This Scottish museum is the only one in the world to focus not on one religion but all of them.

One of Europe's oldest libraries.

The oldest candy store in the world has been selling traditional sweets since 1827.

This giant wooden treehouse within a sprawling garden has its own eatery.

A house of bones — but nobody is quite sure to whom they belong.

A open air theatre built on a cliff by an eccentric British woman.

The largest stone circle in the world has ended up bringing up more questions than it has answered.

Follow the original medieval paths that wind through this intriguing section of the city.

This well-preserved Cistercian Abbey in a romantic pastoral setting has inspired artists like the poet Wordsworth.

A beautiful Greco-Roman structure houses a well once believed to have healing powers.

One of the oldest and certainly best preserved Cistercian abbeys still in existence.

This secluded walkway overlooks a magnificently wild London green space.

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.