A 19th-century funicular railway shuttles visitors up this surprising sea cliff to one of the world's largest camera obscuras.

A medieval replica of King Arthur's legendary table, the Round Table hanging in Winchester Castle was decorated by Henry VIII.

This centuries-old pub boasts a collection of more than 4,500 snippets of neckties from around the world.

This 23-foot-tall bear stands amid the hustle and bustle of Hamad International Airport.

A little marble compass above George Washington's (empty) tomb in the Capitol marks where D.C.'s four quadrants intersect.

Rumor has it the uncarved lump behind the three famous suffragists is reserved for the first woman president.

The 5.5-mile ring of steel posts around the Capitol Building is one of the largest (and most uniform) of its kind in the world.

The institution is sitting on a goldmine of 21,000 paints, varnishes, pigments, and primers preserved for posterity.

A cavernous three-story, 43,800-square-foot basement that was forgotten about for 60 years.

Those with a sharp eye can find the hidden image of a German Shepherd on the memorial's Mural Wall.

An overlooked memorial honoring the local Washington residents who died in World War I.

On the Fourth of July this area will transform into a Pompeii-like storm of falling embers and ash.

The world's most active stratovolcano is almost always erupting.

Spanish architects used seized Muslim gravestones to rebuild parts of the fortress.

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.

A plaque claims this artwork outside a children's hospital was used in the 1998 Quidditch World Cup.

Banksy's image of a naked man dangling from the window of a sex health clinic.

It houses a menagerie of wondrous taxidermy specimens from around the world, including the remains of a famous gorilla.

This picturesque horseshoe weir was first built in the 1600s to prevent flooding in the town of Bath.

Chelsea's soldiers were given strict orders when crossing this historic bridge.

A statue of the legendary Celtic warrior queen who fought the Roman invaders stands in one of the cities she once destroyed.

Tucked away in the Tower of London is the weapon once used to execute high-profile prisoners.

The Great Fire of London and the regulation of one-way streets both started in this alley.