The remains of Martha, the last known passenger pigeon, serve as a tool to educate about conservation.

This research center for rare prosimians is studying how they sleep to help prolong human life.

The highest point in Washington state is a volcano covered in glaciers.

I-95's Tijuana-style celebration of kitsch at the Carolina border.

A wild west land agreement was etched right onto this historic Idaho stone.

An acoustic anomaly with a mysterious cause.

Resting place of the Texas A&M canine mascots, who watch the game from the grave with their own miniature scoreboard.

Modern technology and live displays tell the story of the Pacific during WWII for the Internet generation.

Pilgrimage site for star-crossed lovers.

Go inside to really appreciate this 500-year-old technological masterpiece.

Ancient snack bar of the Roman Empire re-opened.

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

Jesus' footprints and the first catacombs in the world.

2300-year-old Roman road connecting the empire.

A working steam clock, one of only a few in the world, located in Vancouver's Victorian Gastown.

"Girl in a Wetsuit" is what happens when a sculptor has to find a way around a 100 year old copyright.

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

An enormous pink granite batholith, long attributed with spiritual powers by the Tonkawa Indians.

Abandoned railroad tunnel is home to a colony of three million Mexican free-tail bats.

A beautiful geyser under environmental threat.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

The site of Paul Revere's historic two lantern warning.

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

The Boston square dedicated to the dark poet who was born nearby.