This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

This plaza is home to a number of works, including Montpellier‘s own Arc de Triomphe.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

A colorful piece of contemporary art cheerfully clashes with Lyon's historical architecture.

Monsters and miniatures are held in equal esteem at this wondrous museum.

On this romantic tidal island reachable only at low tide the tomb of a famous French writer overlooks the sea.

A stunning 18th-century site where pilgrims ascend by a series of punishing stairs only to return via funicular.

The stunning interior of this Gothic church is covered in ornate gold details.

This restored Portuguese cafe may well be the most beautiful place in the world to grab a Big Mac.

A Gothic cathedral created from volcanic rocks.

The video game-themed street art first popped up in the French city.

Natural history museum celebrating biodiversity with a parade of taxidermy animals.

The water-powered carriages are long gone, but for over a century this funicular railway has been the fastest route to the highest point in Paris.

This museum houses an imposing skeleton army comprised of creatures great and small.

This futuristic building is yet another architectural wonder in Dubai.

On any given day this sprawling market houses literally tons of government-regulated gold, gems, and precious metals.

A preposterously luxurious hotel with gold-plated iPads, Rolls Royce chauffeurs, and a staff that trains by watching "Downton Abbey."

This indoor ski resort has a mountain contained inside a mall.

Legend says it was constructed with the destroyed pillar of an ancient Greek Temple.

The oldest standing Byzantine church in Athens is tucked within a monastery in the middle of an upscale shopping district.

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

This London plaque marks the spot where David Bowie's famous alien made his debut.

London's smallest police station is barely the size of a phone booth.

Eighty million natural history specimens call this gargantuan museum home.