Wallabies live naturally on this Irish island.

Though they've since been renamed, these two streets hint at Dublin's darker days.

Catholics make up 84% of Ireland's population but this Dublin museum remembers the small but important Jewish community.

This is the house that spite built.

The vaguely man-shaped root that ate the body of the founder of Rhode Island.

A monument marks the beginning of the longest north-south road in the United States.

10,500 square feet of pinball housed in former dollar store and home to the last playable "Thunderball."

After covering almost 1.5 billion acres, the survey's still not finished.

A Civil War fort in the middle of Washington, D.C. has been swallowed by a forest.

There's a 12-foot-tall replica of the Washington Monument hidden under a manhole nearby.

A monument in Washington D.C. marks the spot from which all other roads were supposed to stem.

The country's oldest continually-operated mini golf course lies hidden in plain sight, eclipsed by one of D.C.'s most popular tourist attractions.

A tiny piece of the Moon is embedded in this stained glass masterpiece.

The sci-fi villain is a little-known inhabitant of the U.S. capital's largest cathedral.

A historic ruin just 20 feet away from a busy highway onramp.

The world's smallest movie theater runs on solar power—an attraction in itself.

This Welsh village gave itself a ridiculous name in a publicity stunt a century ahead of its time.

The lake that fills and empties itself at random.

This short bridge is the only thing connecting a tiny Irish island to the mainland.

Perfectly preserved ancient monastery in an impossibly dramatic location on a rocky island in the Atlantic.

Northern Ireland's Brobdingnagian stepping stones.

The atmospheric road was never meant to be so creepy.

Petrified footprints of one of the very first vertebrates to walk on land.

Just a few miles off the western coast of Ireland lies an isle steeped in Irish literary history.