A beautiful ruin of a 14th-century Plantagenet castle built by a medieval mercenary.

This centuries-old hotel hides a network of secret cellars and passages once used by smugglers.

These docile dragons are ideal inhabitants for the conservatory greenhouses.

Colin Stokes "got a bit carried away" and built a castle that looks like something out of Tolkien.

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

Fascinating town where normal life interfaces with the occult.

It is said the legendary wizard once lived in this sea cave beneath Tintagel Castle.

These ancient sunken lanes were naturally tunneled into the soft ground by countless footsteps.

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

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.

The longest hedge maze in the world.

These wire animal sculptures commemorate the exotic inhabitants that once called the Tower of London home.

Tucked inside a South Bank bar is an epic expressionist chronicle of the 20th century.

Atop the former site of a historic bakery sit two stone tributes to Verona's contribution to traditional Italian baking.

A small island with shimmering pink sands, home to loggerhead turtles and rare plants.

The Cycladic architecture makes this Athens neighborhood feel like an island paradise hidden in the shadow of the Acropolis.

An abandoned Byzantine fortress and notorious prison.

This gem is often wrongly overshadowed by the larger, newer Metropolis church in Athens.

The ruined doorway is a portal to the building's turbulent and torturous past.

Local lore says two enemy dragons live within these breathtaking mountain lakes.

This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

A quirky bookstore hidden beneath a sea of whitewashed Greek villas.

A spectacular cave and a beguiling lake.

Monasteries on rock pillars, once accessible only by frayed ropes.