This long-hidden space above Westminster Abbey now displays the battle gear of the legendary King Henry V.

This 8th-century Bavarian monastery is home to an exquisite Baroque-era library.

The last occupied troglodyte dwellings in England weren't abandoned until the 1960s.

Surreal riveted sea forts once protected the Kent shores from German attack.

One man has carved a number of natural New Mexico caves into psychedelic sandstone temples.

This medieval sanctuary's tree-framed door looks like a portal to a mythical realm.

On this wooded path, a stained-glass window creates a spellbinding forest cathedral.

Houses are tucked between, on, and underneath giant boulders.

This unreal Portuguese palace looks as though it's made from a pile of different castles.

A menacing statue of this mythical creature can be seen at the legendary site of the monster's lair.

After visiting hours, this picturesque waterfall is essentially turned "off" to be used for hydroelectric power.

These old World War II fortifications have been transformed into an unusual equine attraction.

This exceptionally well-preserved ancient marvel also houses a small museum dedicated to Jordanian folk tradition.

A star-shaped fortress town fort built in the geometric model of the Renaissance utopian city.

This amazing 15th-century mural remained hidden in plain sight for centuries.

A lush indoor jungle fills this bustling Madrid transportation hub.

A clerical error gave rise to this imaginary micronation in the southwestern corner of Estonia.

A collision of human error and natural geothermal pressure created this rainbow-colored geologic wonder.

From Nazi chemicals to the CIA, this architectural marvel has played a fascinating role in German history.

Ancient barriers wrap around what was once an important stop along the Silk Road.

A former bastion of Rajput chivalry, this massive hill fort is the site of legend and tragedy.

The land is full of geologic eye candy, such as otherworldly spires, mushroom-shaped hoodoos, and prehistoric fossils.

This stunning 15th-century royal hill fort preserves the age of chivalry in Rajasthan.

Grab a cuppa at England's first and only domestic tea plantation.