Scattered throughout London are ancient remnants of the city's former bounding wall.

An incarceration museum on the spot of possibly the oldest prison in England.

Hear the quietest sound from across the dome.

Hollywood's oldest hotel is the site of the first Academy Awards, the birthplace of Marilyn Monroe's career, and the home of Montgomery Clift's ghost.

This centerpiece of the Hollywood & Highland shopping center is a recreation of a long-lost movie set.

These two monoliths have stood at the entrance to the neighborhood since the days it was called "Hollywoodland."

The blinking light atop the iconic landmark has been sending secret messages for decades.

An historic and oft-filmed spot for musclebound iron pumpers on the Pacific coast.

The world's longest outdoor covered escalator system transports commuters through Hong Kong's hilly terrain.

The embalmed remains of the communist leader lie within a custom crystal coffin.

Dublin's most modern, visually spectacular bridge is modeled after Ireland's national emblem.

The modern birthplace of Irish freedom.

The somber sculptures commemorating Irish Famine on the river Liffey in Dublin.

The comedy and tragedy of Oscar Wilde is preserved in a Dublin park, captured in a sculpture of colorful stone.

The "Seinfeld" diner.

The enormous 250-room Vanderbilt mansion conceals hidden doors and secret passageways.

Once the most flame resistant building in the country, the South Carolina Historical Society building was almost burnt down in a fire.

An eerie smiling woman looms above the granite tombstones.

One of Savannah's oldest and most haunted cemeteries, featuring graves desecrated by Sherman's Union Army.

A statue honoring 44 continuous years of greeting passing ships.

Once adorning a New York skyscraper, these reclaimed ruins now haunt an Indiana park.

Numerical symbolism abound at East Asia's oldest observatory.

Over 80,000 carved wood blocks make up one of the world's oldest intact Buddhist canons.

The site of many tense prisoner exchanges across the Military Demarcation Line between North and South Korea.