Sky ships, planes, and portraits left as unique tokens of hope and thankfulness.

Giant eggs, walls of bread, and nightmare surreality mark the largest collection of works by Salvador Dalí.

Thousands of tourists and residents in Cologne affix "love padlocks" on the Hohenzollernbrücke Bridge to symbolize their affections.

This futuristic German television spire is actually the world's largest digital clock.

Unconventional site where the tracks of Zurich tramcars intersect.

Oxford University's stateliest library seems designed to make students truly feel the weight of knowledge.

This 11th century tower is said to be the oldest building in Oxford.

A theatre built to house the rowdy Oxford graduation ceremonies became the stage for a debate about God's existence.

Home to the most complete dodo remains known - one head, and one foot.

Ancient Egyptian wigs, South American feather headdresses, a bounty of anthropological artifacts in Oxford.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

The iconic boulevard is the perfect place to catch sight of a bicycling skeleton, a levitating Satan, or a chef with his head stuck in a pizza.

A temple to modernity, tucked away amid Barcelona's more well known museums.

One of the most photographed buildings in a city known for its Modernista architecture is an abandoned squat.

This former Baroque palace on the historic Calle Montcada is a rare architectural gem and was once the meeting place of an aristocratic scholarly society.

A vista of the city and sea from atop the little-known viewing deck on an unassuming Columbus statue.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

This semi-secret storybook hedge maze is also the oldest garden in the city.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

Massive galleon from a box-office bomb docked in Genoa.

No one is sure if the world's fourth-largest diamond had been found in a rubbish heap or was pawned by Napoleon's mom.

A fountain standing as a testament to a doomed alliance.

The legendary luxury train passage is commemorated with a charming museum inside its former eastern terminus.

Ancient serpentine sacrifice holder that has stood the test of time.