This remarkably well-preserved Egyptian plinth is pretty well traveled for a giant piece of stone.

Five sultans and their families rest in eternal splendor, teeming with overlooked beauty and drama.

A marvel of Byzantine engineering under the streets of Istanbul.

This lovely pocket park is one of the most under appreciated in D.C.

An Industrial Revolution-era public work that purified water using nothing but sand.

Art deco landmark on the outskirts of Washington, D.C.

The national park was once a plantation estate.

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 wondrous old library overlooking the nation's capital.

Franciscan monks created a facsimile of the Holy Land for North Americans who couldn’t afford the trip overseas.

A four-hour holy-rolling, Hallelujah-shouting, Southern gospel service, rendered as a country market where "All Is Welcome, Jews, and Gentiles."

This iron and wood Civil War city-ship was the first vessel to be sunk by an electrically detonated torpedo.

A Muppet museum in small-town Mississippi honors the roots of Jim Henson's most beloved creation.

This racially troublesome eatery thought a new coat of paint could erase its offensive connotations.

An eerie and beautiful group of columns mark the site of a grand mansion lost to time and fire.

The ill-fated plan to reroute the Mississippi so that Union ships could bypass Confederate fortifications on the river bend.

A 300-yard long natural tunnel runs through a ridge deep in the Appalachian Mountains.

A sacred site for Native Americans surveyed by George Washington and owned by both King George III and Thomas Jefferson.

One of the last active volcanoes on the Eastern seaboard.

Quaint, disturbing, and macabre objects are all on display at this intriguing collection of medical instruments from bygone eras.

The often-overlooked ruins of one of the first buildings designed by famous landscape architect Frederick Olmsted.

On the Oregon coast there is a natural hole that seems to be draining the sea.

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

This tipsy office building in downtown Prague was originally called “Fred and Ginger.”