Lake Champlain Bridge, the recently demolished and rebuilt bridge where they filmed "What Lies Beneath".

Hidden beneath the famous St. Peter's Basilica is a veritable city of the dead that may hold the remains of St. Peter himself.

Thousands of well-dressed mummies below a monastery.

This triumphal 16th-century arched gateway leads to the oldest street in Palermo.

Tourists to the mountaintop Sicilian town often overlook its ancient fortifications.

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

Italian cave with exceptional acoustics and an unsavory history.

"Stairs of the Turks", a chalky white cliff eroded conveniently into stairs, allowing for easy pillaging.

The yawning maw of this pagan visage is said to bite off the hands of liars.

An interesting decoration on this historic site, this weathervane comes with as many legends as it does questions.

A former waterfront market is now in the center of town due to some interesting Boston engineering.

This pavement line and accompanying statue commemorates the starting point for the world's oldest annual marathon.

This evocatively named natural crevasse was created by a torrent of water that smashed right through a granite deposit.

A grave surprise in the downtown area of New England's second-largest city.

This legendary urban waterfall creates a dazzling display of rainbows.

Hide from the tourist hordes in these relatively unknown, and unguarded lava caves.

Earth's tallest volcano is sacred to Native Hawaiians, and home to a dozen world-class observatories.

This black shoreline is made up of exploded lava particles.

The southernmost point in the United States is a beautiful place to look at but a deadly place to wade in.

Once the site of the Hawaiian monarchy, this building was originally designed as a palace.

This museum of Hawaiian and Polynesian culture is the legacy of the last descendant of the Kamehameha Dynasty.

The air force base preserves its scars from the Japanese attack on Pearl Harbor.

This saltwater swimming pool, which is the last of its kind in the United States, is slowly crumbling within sight of multiple high-end beachside hotels.

The only royal palace on U.S. soil has been a territorial capitol, a military headquarters, and a prison for a queen.