Not merely a museum – but a whirring powerhouse that offers a subterranean peek into the heart and soul of cable car operations.

What's left of the ruins of the 1893 Columbian Exhibition, or World's Fair, also known as the White City.

At Chicago's revered Field Museum, visitors are invited to learn about and literally explore DNA.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

Ancient snack bar of the Roman Empire re-opened.

The last moments of the ill-fated Pompeiians, frozen forever in plaster.

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

The glowing blue Nymphaeum of Emperor Tiberius.

2300-year-old Roman road connecting the empire.

A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

At the crypt of St. Mary of Eulogies and the Dead you are left alone to ponder mortality among piles of skulls.

At 207 feet, one of the world's longest continuous escalators.

Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.

High on a hill overlooking Los Angeles lives a world famous, high power conical Tesla Coil.

Resting place of Hollywood's immortals is also site of summer film screenings.

A series of waterfalls and pools that flow through the 'Ohe'o Gulch and into the ocean.

Take shelter from Hawai'i's tropical heat under the massive canopy of largest Banyan tree on the island.

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

Wedding chapel's mysterious spiral staircase said to be miraculously constructed.

This bridge was constructed from the rubble of the infamous Bastille.

The celebrated eyesore created by starry-eyed sweethearts.

Turning night into day in Victorian-era Austin to thwart a serial killer.

Twenty-seven massive radio antennas on the high plains of New Mexico search for life on other planets.