This Tennessee museum is dedicated to a tragic railroad hero who inspired the famous ballad that bears his name.

Once decrepit and slated for demolition, now one of the longest pedestrian bridges in the world.

Knoxville’s architectural icon was the symbol of the 1982 World’s Fair, even catching the googly eye of Bart Simpson.

An oversized metal construction of Billy Tripp's moods going through life.

All you ever needed or wanted to know about America's favorite whiskey, but not a drop to drink.

A failed utopian experiment for British expats in the American South is now a Victorian village frozen in time.

This head-spinningly bizarre Depression-era art cave is wall-to-wall quartz and Jesus.

Labor provided by Great Depression-era programs restored these 25,000 acres in Tennessee.

This replica of the Greek structure is in the heart of Nashville.

The secret city built by the Manhattan Project.

Every day a troupe of pampered water fowl walk the red carpet to their favorite fountain.

The largest portal tomb in Europe has a capstone weighing around 150 tons.

See some of the world's greatest racing horses at this idyllic thoroughbred breeding facility and garden complex.

A sacred well steeped in Pagan roots on the West Coast of Ireland.

A hugely vast Irish landscape of barren rock that stretches for miles.

This singular Irish dolmen is more Frank Lloyd Wright than upright stonehenge.

The ruins of an 800-year-old monastery boasts the tallest round tower in Ireland.

The oldest pub in Ireland may also be the oldest surviving bar in the entire world.

The ancient tomb acts as a calendar that keeps perfect time.

A rocky Irish outcropping with a history of wealth, conflict, and ruin.

This ancient Irish religious site is covered in ancient carvings, many of which have barely aged.

One of the most popular megalithic sites in Ireland stands as a humbler version of Stonehenge.

Every equinox this Maya pyramid puts on a spooky ancient light show.

The beloved statue at the National Academy of Sciences is oh so inviting to sit on.