The peaceful space is adorned by paintings by the famed abstract artist Mark Rothko.

A statue of a mischievous raccoon towers over this city park.

These beautiful objects represent beautiful ideas.

The Byzantine, pre-Columbian, and medieval art at this stately mansion are some of the most under-appreciated collections in D.C.

World's largest carved onyx figure stands as a tribute to enduring peace.

Duluth mineral magnates built this charming art deco lodge to be their private clubhouse.

This lab's maddening silence is good for business but bad for sanity.

The medieval prince founded the first library in Ukraine at Saint Sophia's Cathedral where he was interred.

A museum honoring Germany’s cucumber mecca offers a great dill of gherkin history.

This beautiful Miami garden was designed as a laboratory for tropical plants.

This old mill and former police station now present a world-class collection of Orthodox iconography.

The thousands of shades on display — some toxic, others impossibly rare — are a library of more than just color.

The flower-shaped temple in Virginia aims to transcend the boundaries of the world’s religions.

A tiny red pebble marks what may be the quietest outdoor spot in the United States.

The New York hotel where tragic visionary Nikola Tesla spent his final hours, destitute and alone but for the pigeons.

In which a local geological marvel becomes a quaint roadside attraction.

It would take 35 firetrucks to fill this enormous glacial pothole.

Dedicated to the art and science of glass in equal measure, this space is as much laboratory as museum.

Contrary to what one might expect, ice forms inside this small cavern during the summer and melts during the winter.

"Dark Sky Park" is heaven on Earth for astronomers, one of the rare U.S. locations with no artificial light pollution.

Penn State's giant bug collection.

This lush forest valley was once mined for lumber to the extent that it was once nicknamed "The Pennsylvania Desert."

Sail through this subterranean show cave that is home to a legend that would go on to name nearly everything around it.

Part modern art project, part traditional chapel, this see-through church is only substantial from the right angle.