These unique stepping stones hug a river's edge to take hikers on a journey through a limestone gorge.

A magnificent winding road through a steep valley, with deep natural caverns at the bottom

This iconic Peak District ridge was once one of the busiest roads in medieval Britain.

The oldest of the three remaining bridges in England with buildings on top of them.

The adorable animals return to this nature reserve every fall to give birth to their pups.

The location of the Bridge of Death and the Gorge of Eternal Peril in "Monty Python and the Holy Grail."

This astonishingly geometric cave has inspired everyone from Jules Verne to Pink Floyd.

Preserved baths in a Victorian-era spa town frequented by the most famous people of its day.

All that remains of the only English cathedral destroyed in the Protestant Reformation.

Austrian and Germans who died on British soil during World War I and II are buried here.

Looking strangely like Rome's Colosseum, this unfinished tower has dominated the skyline for over 100 years.

The sculpture shows a water rat turning the world upside-down, landing an elephant on its head.

One of the most spectacular bridges in Spain spans a narrow chasm that divides the city of Ronda.

Three bridges and one giant canyon make up this fantastic Spanish settlement.

Single runway interrupted by a busy road that cuts across its middle.

The stoic structure boasts a whimsical set of stained glass art commemorating Lewis Carroll.

Bordered by forest on three sides and the ocean on the other, the Great Dune of Pilat is the highest sand dune in Europe.

Originally a meeting place for foreign correspondents and war reporters, the FCC remains an atmospheric spot for sunset drinks in Phnom Penh.

Khmer Rouge's high security prison.

Brisbane's manmade urban beach has enough water to fill five Olympic-sized swimming pools.

The phone booths in this English town have distinctly milky hues.

Legend says this demonic carving inside a medieval cathedral was one of Satan's minions.

Every hour on the hour a naked heroine and her leering foil appear from this giant cuckoo clock.

The bombed out remains of the old church were kept intact next to the new one, as a reminder of the futility of war.