This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

Macabre symbols of death and mummies on display set the tone of this Italian purgatory church.

The mortal remains of a Russian prince, priest and paranormal investigator who came to America in 1792.

This quaint stretch of road is the final resting place for hundreds of America's four-legged veterans.

A diorama of the Civil War, fought by cats.

The remains of a 1st-century aristocratic Roman town house featuring beautiful well-preserved mosaics.

A small granite block at this monument's base is the only part of Lincoln's Tomb outside of Illinois.

A soon-to-be-forgotten roadside spectacle loaded with local lore.

This 50-foot-deep sinkhole created in the 14th century is home to rare plants and fungi.

This Stone Age solar temple aligns with the sun on each equinox and solstice.

Burial grounds for more than 1,000 bodies deep under the modern town of Rabat.

Thanks to a loophole in property ownership, this alleyway has become a cacophonous street gallery.

This black shoreline is made up of exploded lava particles.

Every president in history is immortalized in bronze in downtown Rapid City.

A six-ton, 12-foot-tall concrete prairie dog is touted as the largest in the world.

The granddaddy of all tourist traps, built on ice water, jackalopes, and a giant dinosaur.

This rare triple-jurisdiction drawbridge passes through Virginia, Maryland, and Washington, D.C.

Walk through the history of American pop culture.

The trials and tribulations of marking Poe’s grave.

A daily replay of the experiment that proved the rotation of the Earth.

Where the oil industry began.

Memorializing an American tragedy of massive proportions.

What looks like a simple quaint estate in rural Pennsylvania was in the 18th century home to a small monastic community.

This collection honors the iconic, and proudly American lighter that just won't quit.