Before it was buried by volcanic ash, this fast-food restaurant fed the hungry hordes of ancient Rome.

A brass and marble scale model of the solar system embedded in the concrete.

Under the shadow of its towering parent tree, a rare specimen of sequoia produces ghostly white leaves.

These unique "earth pyramid" clay columns can be found in ravines around the village of Tirolo.

A shop full of natural curiosities, carnivorous plants, and costumed taxidermied mice.

The largest university building in the West is a gothic masterpiece containing dozens of theme rooms based on different countries.

Ancient snack bar of the Roman Empire re-opened.

Giant Redwood-themed cafeteria operates under the golden rule, "Dine Free Unless Delighted."

An unusual round church in London with a Templar past.

Every equinox this Maya pyramid puts on a spooky ancient light show.

At this Denver landmark, the meals are compulsory, the sopapillas are complimentary, and the insanity is everywhere.

The unbelievably opulent home built for an infamous newspaperman.

San Francisco's urban bison herd has persisted in the face of extinction, development, and disease.

This ritzy Italian market is built around a statue of an unforgiven heretic who was burned for his belief in an endless universe.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

It houses the remains of a 17th-century version of the Titanic.

Catacombs turned marketplace.

Carnivorous plants, medieval aphrodisiacs, and the largest original wood structure glass conservatory in the western hemisphere.

A 98-room castle in the middle of Toronto that bankrupted a 19th century electricity multimillionaire.

Golden Gate Park's historic collection of plants.

The perfectly preserved underground rooms where Churchill plotted the war against Germany.

This one has sailed five times as far as Sir Francis Drake's famous ship.

A beautiful geyser under environmental threat.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.