This natural wonder is disappearing at an alarming rate.

Northern Ireland's Brobdingnagian stepping stones.

The summer tourists on these cliffs are thousands of seabirds.

One of the most beautiful bookstores in the world hides a neo-Gothic interior behind an art nouveau facade.

These official units of measurement—including chains and perches—lie hidden beneath tourists' feet in a popular London hub.

Macbeth's infamous "Great Birnam Wood."

The beloved fantasy novelist is buried near a church containing a whimsical etched glass window full of Narnia favorites.

The 16th-century church has the only stained glass windows that survived the Scottish Reformation intact.

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

The majority of the museum's large collection is held in a storage space open to the public a few times a year.

A village on the east coast of England that has almost completely eroded into the North Sea.

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

This Scottish manor house is a lush relic from the life of a literary great.

One of Europe's oldest libraries.

A perilous medieval road leading right into the sea.

This otherwise ordinary close on the Royal Mile constituted the end of the world for Edinburgh’s poorest residents.

A relic of Victorian grandeur hides beneath a busy South London road.

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

This historic pub has maintained much of its 1906 decor, including a small sequestered room for women, where orders were slipped through a tiny window.

Overlooked by many, the two famous Scottish warriors guard the main gate of Edinburgh Castle.

There's an exclusive Beefeaters pub hidden in the Tower of London.

A century-old tradition has culminated in a small but singular collection of feline effigies.

Installed at a chaotic intersection, this gave London traffic cops a place to hang their heavy woolen coats.

A friendly pub with a sordid past in cock fighting.