Wall after wall of this French seaside neighborhood is intricately decorated with seashells and corals.

The massive white mound and accompanying water terraces are a striking geological oddity.

A small marionette collection located within the dark cellars of an 11th-century Austrian castle.

A series of tiny artificial islands rich with produce bob atop the surface of the lake.

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

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

One of its engravings is believed to be among the first representations of medical and surgical instruments.

This bustling Italian plaza is built on the ruins of an ancient Roman amphitheater.

A contemporary fresco movement illustrates the region's rich history.

This charming colonial alleyway is one of the oldest continuously used residential streets in the U.S.

Where Venice's gondolas go for a tune-up.

Mrs. Mallard and her brood are a beloved fixture in Boston Public Garden.

Only the foundation remains of the rest stop building that was hit by three large tsunami waves, killing 47 visitors.

This lovely picnic spot featuring thunderous jet landings is an aircraft spotter’s dream.

This natural sea cave hides a small wonderland of natural turquoise beauty.

An ancient instrument used to measure the waters of the Nile so Egyptian farmers would know whether to expect famine or flood.

This steep cable railway has been hoisting passengers in the heart of Québec City for over a century.

This lovely, if imposing, piece of Canadian gothic is possibly the most photographed hotel in the world.

The only sea in the world that has no land boundary.

The romance of early commercial flight still fills this Art Deco destination.

City law dictates that this mountaintop cathedral containing the heart of a saint is to remain the tallest building in town.

Designed by Buckminster Fuller, this relic of the 67 Expo survived fire and ice.

Small ship votives hang from the vaulted ceiling of this port-side church with a Latin inscription on the wall.

This 1967 experiment in modular architecture was designed to be a new model for urban living.