This historic covered bridge contains a series of macabre paintings that communicate one thing: everyone dies.

This memorial commemorating fallen Swiss Guards of the French Revolution has been called the saddest stone in the world.

These spooky and unusual stone formations create an underworldly landscape.

A breathtaking bridge that crosses a vast gorge over a river's torrents, and has a tale of a devil architect attached.

This is not only one of the oldest collections in Europe, but also possibly the most beautiful.

Where the lovelorn find a home for their sentimental keepsakes.

The largest free-standing aquarium in the world resides in a hotel lobby in Berlin.

Once the tallest building in the world and the site of "the highest dinner ever held in New York" this building now holds the most expensive penthouse in the city.

A monument in Washington D.C. marks the spot from which all other roads were supposed to stem.

Dr Barnes' $25 billion private collection of art and arboretum.

The last of Philadelphia's wood-paved streets is now a landmark of terrible engineering.

Huge masonic hall in Philadelphia with lavishly themed rooms.

The bears of Bern have been a city highlight for over 500 years.

A nearly 500-year-old sculpture depicts a man eating a sack of babies, and no one is sure why.

One of the longest wooden benches in the world snakes around Geneva's Treille Promenade.

Unconventional site where the tracks of Zurich tramcars intersect.

One of a series of no-purpose kinetic artworks by Swiss sculptor Jean Tinguely.

Hear the quietest sound from across the dome.

Public access to clean drinking water was an instant hit among the masses.

A friendly pub with a sordid past in cock fighting.

Giant, friendly pelicans in Central London, the most unlikely of places.

The perfectly preserved underground rooms where Churchill plotted the war against Germany.