A reversed traffic signal that was once violently misinterpreted as a statement on British-Irish relations.

A 300-yard long natural tunnel runs through a ridge deep in the Appalachian Mountains.

This museum devoted to the gothic author holds such interesting ephemera as his socks and walking stick.

This former theme park in New York's Adirondack Mountains fell into ruin before being resurrected as a state-run campground

The only Bahá'í house of worship in North America and one of only a handful worldwide.

Huge abstract sculptures of the Puerto Rican Flag.

All of Chicago's wood-paved streets are long gone but two alleys remain.

Daily jousts and dancing barrel makers in Munich's mechanical clock.

Sitting in the basement of a castle, the largest wine barrel in the world is bigger than most apartments.

A castle from the Holy Roman Empire that hosts traveling youth... in its stables.

The last bastion of Roman presence north of the Alps looms over a German town.

This modern French ossuary contains the jumbled bones of 130,000 WWI soldiers.

Site of one of World War I's most horrific scenes.

This ancient ruined monastery has been destroyed by fire so many times that it seems like God hates it.

There has been an astronomical clock on this spot since the 14th century.

Legends surround this jagged rock formation in the New Mexico desert.

Walk in the footsteps of the gods and straddle two tectonic plates.

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.

This eye-popping Icelandic crater lake is surrounded by red volcanic rock.

A collection of unique outdoor sculptures surounded by the beauty of nature.

This Niagara Falls tourist trap is a world bright with neon and curiosities that will inspire love, hate, or a mixture of both.

One of many reminders of Tesla's scientific contributions overlooks the falls which inspired him.

Toxic waste disaster that founded the Superfund program.

A natural gas leak provides a flickering flame beneath a waterfall.