The doodles of a genius line the walls of a secret room under the Medici Chapel, where they were hidden for nearly 500 years.

Hidden in an Italian forest is a completely homemade amusement park that has taken a lifetime to create.

The glowing blue Nymphaeum of Emperor Tiberius.

2300-year-old Roman road connecting the empire.

As can be expected from a centuries old church built in a canal city, the undercroft of this house of worship is beautifully flooded.

Geothermal waterfalls in Tuscany.

This hidden Art Nouveau courtyard is an opulent feast for the eyes.

According to the local folklore, the myriad colors of this lake are the result of a lovelorn wizard's blunder.

Rome's semi-secret peephole vista is also a former Crusader stronghold.

This Venice bookstore has resigned itself to constant flooding by keeping its books in bathtubs and boats.

An Italian crevasse filled with abandoned buildings gives visitors a look at the world without humans.

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

The largest puppetry museum in the United States houses the world's most complete collection of Jim Henson artifacts.

Thousands of Mexican Free-Tailed Bats soar around an abandoned storm drain at sunset each summer.

This striking public art installation is suspended above a public park, designed to gently move in the breeze.

The installation’s official name, “You Who Are Getting Obliterated in the Dancing Swarm of Fireflies,” says it all.

3/4-scale model of the White House in Atlanta, Georgia.

Secret gardens just a few miles from downtown Atlanta.

Scattered around Atlanta are little doors with big charm.

Neglected resting place of some of the city's early luminaries—and a woman encased in concrete.

One of the largest Native American shell middens stands 30 feet tall.

The largest freshwater lake in the Florida Keys.

A thriving Black community was destroyed by an angry white mob at this site in 1923.

Visit these gentle, bell-bottomed, exquisite equines at the home of North America's first Gypsy Vanner horses.