Largest Roman Catholic church in North America.

The tallest The Church of Jesus Christ of Latter-day Saints temple in the world soars above the Beltway.

The gilded vestiges of a sterling department store can still be found in a Brooklyn shopping center.

Brooklyn's most iconic restaurant, resurrected.

Mine shafts and hard pastries await visitors at this massive mountain of salt.

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

A bit of retro transportation flair preserved in the world's largest department store.

Mortarless walls that stretch for miles are a lovely solution for creating grazing land in the harsh terrain of the Aran Islands.

Berkeley Hot Springs presents to you "the only outdoor monument to presidential bathing."

This historic tower in the California desert promises visitors a "vortex of good vibes".

Turns out you can see the world without ever leaving Maine.

The only Civil War battle in Washington D.C. took place near this highest natural point in the city.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

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

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

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

This controversial Irish show cave is home to a massive formation known as the Great Stalactite.

This ancient Irish tower could easily have stood in for Rapunzel's prison.

Three prestigious academic collections come together to create a world-class natural history museum.

At 135 years old and counting, this historic print shop is heaven for poster nerds and music buffs.

A haunting tribute to pioneering photographer Clover Adams.

The first car-centric shopping plaza in the U.S. brought a little bit of Spain to downtown Kansas City.

Helen Keller once broke ground on this historic center for the study of technologies to benefit the hearing impaired.

Enormous piles of historically significant stones, dumped by Congress in a forest, and abandoned for 60 years.