An otherworldly restaurant perched on the edge of a jagged cliff next to a medieval holy city.

This whimsically named Vietnamese stream is closer to a walkway than a waterway.

Shoreline strewn with the remains of ghostly fallen trees.

Stained glass windows bathe this botanical garden in cosmic light.

The walls are decorated with whimsical murals painted by the creator of the Madeline franchise.

Upside-down trees serve as natural flower pots in this hanging garden of Alaska.

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

Overlooked amid the tourist bustle of Florence, this museum is dedicated to the craft of stone inlay.

Renaissance hospital featuring a rotating door into which unwanted babies were dropped.

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

A large grotto built in the 16th century amidst Florence's famous Boboli gardens.

2300-year-old Roman road connecting the empire.

Architectureal fantasy quarter of Rome.

Go inside to really appreciate this 500-year-old technological masterpiece.

This community on a small Venetian island has taken to painting their houses in bright neon hues.

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

Pompeii's less famous neighbor is still revealing her secrets.

Hundreds of hidden passageways weave through the old quarters of Lyon.

One of the only cooperatively owned bars in the nation wears its eclectic history on its walls.

Spanning an elevation of 160 feet and containing 388 steps, this is Seattle's longest staircase.

A pair of slides and a tree-lined stair corridor have been an urban oasis for nearly 40 years.

An artsy hidden staircase leads to breathtaking views of San Francisco.

Filled with goldfish swimming in a shallow pool of sea water, this ancient crypt is more wishing well than burial site.

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