Mongolian Buddhists believe this monastery in the Gobi desert to be the center of the world's spiritual energy.

A former barn converted into a massive train diorama.

A plaque marks a former safe house on the secret route, now hidden next to a McDonald's.

Featuring one of the most complete and original collections of Presidential memorabilia, this is the site of the last front porch presidential campaigns.

The longest living non-clonal organisms on Earth.

One of the most remote spots in America and the first protected wilderness area in Nevada, named after an old legend.

The only Bahá'í house of worship in North America and one of only a handful worldwide.

The highest point in Wisconsin is capped by two towers that are not as mythic as Tolkien's but provide much better views.

Museum dedicated to the art of cutting and polishing stones.

Tour the luxe "glass cage" that inspired and unnerved the architecture world upon its debut.

Medical museum focused on antique anesthesiology equipment.

Cold War missile launch site which has been converted to a public park.

World's second largest particle accelerator, where nature reveals its secrets.

Recognized the world over as the home of the McCallisters in the 1990 movie "Home Alone."

This historic store hides a museum exhibiting a shoe-sizing x-ray machine and a pair of kicks that once belonged to the world's tallest man.

A replica viking ship from the Chicago World's Fair is still in dry dock in an Illinois park.

The face of a woman pushes its way through the earth.

A onetime gangsters' hideaway where you can dine on steaks, fine wines, and cigars just like they once did.

A curious sculpture garden and museum in Cochrane, Wisconsin.

This sprawling mini-golf empire is an impressive testament to a disappearing attraction.

The remains of a Rockefeller's lush Italianate estate hidden in the underbrush on the coast of Lake Michigan.

Former hotel turned into haunted playground.

For just a few bucks, this Iowa funicular will let you feel like an 1800s fat cat.

A tribute to the twin ideals of religion and patriotism, built by a Catholic priest from rocks, glass, and innumerable found items.