The grandiose interior of this bar speaks to its past as home to famous jewelers and railway offices.

Once one of the most polluted caves in America, now an environmental success story and a museum dedicated to caves.

The mysterious wonder of an underground waterfall is illuminated by multicolored lights.

One of Amsterdam's narrowest houses is located right across the canal from its widest.

This tremendous timepiece was once the largest cuckoo clock in the world.

A famed artist's inspiring work of peace and tolerance.

Not far from the more famous House of Juliet, visitors will find the supposed residence of her lover.

A whale rib was used to advertise the store by the arch that offered exotic goods from far away.

Pilgrimage site for star-crossed lovers.

This medieval castle was reconstructed by Carlo Scarpa.

A copy of the famous statue can be found in this Florence piazza, along with one of the most breathtaking views of the city below.

Two stone columns flank the grand Venice square, but there were supposed to be three.

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

This deconsecrated church has seen many uses, from a tobacco storehouse to a cinema.

Breathtaking and huge 430 year old maps of Italy.

A former limestone quarry has found a new life as a flourishing community garden.