This Seattle museum displays the history of the telephone through an impressive collection of telecom equipment.

A subterranean shelter remains intact under a busy Paris railway station.

This dig site outside D.C. is known for its exceptionally high density of baby dinosaur fossils and dinosaur eggs.

Amsterdam's Red Light District leaves little to the imagination.

This subterranean studio is filled with fascinating kinetic art.

This 1920s Amsterdam neighborhood was built as a giant experiment in concrete construction.

A unique collection of gilded age mechanical pianos.

A floating cat sanctuary on an Amsterdam canal.

An Amsterdam street lined with antique shops each one dedicated to a different obscure collection.

150 or so scrounged-up lamps, chandeliers, and lanterns light up this alley in central Athens.

The ruined doorway is a portal to the building's turbulent and torturous past.

This ancient hydrological marvel is now the base of a modern outdoor cinema.

An ancient octagonal weather station named for the eight Greek gods of wind.

A 2,000-year-old computer demonstrates remarkable engineering and astronomical precision.

The curious underground history of keeping Paris clean.

The history of radiation is on safe display at the foot of a radiation science laboratory.

This Parisian café sticks almost exclusively to an ethos of reuse.

A favorite Paris bar for U.S. expats, including Gershwin, Hemingway, and James Bond.

A haunting collection of the vanished and disappearing natural world.

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.