This was once the largest four-sided clock in the world (yes, even bigger than Big Ben).

The spaceship-like theater, which is still in use, was one of the most popular exhibits at the 1964 New York World's Fair.

The trials and tribulations of marking Poe's grave.

After a traumatic encounter with a six-foot eel, one Galway baker started making a daily loaf of sourdough in its shape.

This modest plaza in Moneygall, Ireland has cashed in on its distant connection to the U.S. president.

Dublin's most modern, visually spectacular bridge is modeled after Ireland's national emblem.

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

Traveling this mountain pass reveals quaint stone buildings, stunning Irish scenery, and a bridge said to grant wishes.

Live long and prosper in Tennessee.

This work of engineering is imbued with elegance and ingeniousness.

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

Take a dip in the world's largest mineral hot springs pool.

Harry Potter’s Hogsmeade Station is also a charming blast from the past situated in North Yorkshire.

This museum explores the grim reality of life in the earliest British colonies in America.

These delicate buggers are some of the rarest fossils that have bubbled up from the Tar Pits.

A dangerous narrow-gauge railroad once traced a route through this striking canyon.

Two creeks flow out of either end of this canyon in opposite directions.

This rooftop sign has been confusing Milwaukee-bound airline passengers for decades.

The world-record holder for the longest bridge stretching continuously over water.

Over thousands of years, this slot canyon was carved out of the bed of an ancient lake.

According to the legend, this strikingly beautiful hill has miraculous healing powers.

Home to the world's largest refracting telescope and the birthplace of modern astrophysics.

A large circus museum with summer performances.

This cave holds a surprisingly colorful variety of geological oddities.