The world's longest and deepest train tunnel.

This artistic fountain display pays homage to this area's theatrical history.

The smallest museum in Basel, Switzerland, is a two-foot-by-two-foot window in the door of a 600-year-old house.

The oldest surviving wooden bridge over Rhine lets travelers cross easily from Switzerland to Liechtensten.

Historic fortifications form the boundary of Vatican City, but it’s not entirely surrounded by walls.

The smaller of the three towers of San Marino is a former prison inaccessible from the ground level.

This church is named for one of the most dramatic tales in the early Christian church.

The chefs at El Diablo use heat generated by an active volcano to cook the food.

Visit a surreal landscape so otherworldly NASA actually used it to train the Apollo 17 crew.

This beautifully verdant lagoon is tucked below a massive volcano in a crater atop a black pebble beach.

One of the Seven Wonders of the Modern World holds the world's tallest metal staircase.

Willy Wonka would love this weird half-a-home.

The oldest landmark of Toronto is a testament to shifting sands.

A 98-room castle in the middle of Toronto that bankrupted a 19th century electricity multimillionaire.

This Hindu temple is an architectural marvel designed and built according to ancient Indian principles.

The mastermind behind this palatial hotel perished on the Titanic weeks before its grand opening.

A grand Gothic Revival basilica with stained glass depictions of Montreal's religious history has only one soul resting in its crypt.

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

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

A 400-square foot model of historic Quebec is the playing field for a state of the art light and sound show.

This insurance company building reminds customers that witches, bears, and gnomes are out there, best be insured.

A subterranean house of worship carved right out of the bedrock.

The Guardian of Tallinn.

An empty relic of the Moscow Olympics crumbles away in Estonia's capital.