Miraculous tree that seems to sprout out of solid rock.

This private residence was the template for one of the most beloved television homes of all time.

North America's first frozen mummified remains of an ice age steppe bison, the 36,000 year-old mummy named "Blue Babe."

These medieval skyscrapers dominate the skyline of this small Tuscan town.

One of America's first dinosaur parks gives a window into Depression-era paleontology.

Surrounded by a hundred mile radius of billboards, Little America is a roadside attraction whose primary appeal is hospitality.

Ancient snack bar of the Roman Empire re-opened.

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

Baroque celebration of the end of the Great Plague of Vienna.

Secret refuge and museum of the Duke of Florence.

The world's longest known cave system.

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

Op-art architecture designed for happiness.

The only "Egyptian" pyramid in Europe and the legendary tomb of Remus.

Apartment complexes built into huge repurposed natural gas tanks.

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

Aqueducts have dramatically changed this old lake, now home to tufa towers and its very own species of tiny brine shrimp.

A fitting attraction for the corn capital of the world.

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

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

A Nesting Doll of Churches.

An experimental, automotive replica of Stonehenge.