This abandoned Brutalist treehouse is a hidden architectural relic.

One of the oldest medical collections in Europe focusing on rare surgical instruments.

This urban drawbridge gained eternal pop culture fame when the Blues Brothers jumped it while it was raised.

Ruined pieces of stone and a swimming pool are all that remain of an amusement park swept away by a flood.

This 19th century mansion façade adorned with immigrant patriotism is a symbol of Louisville’s history.

The Midwestern United States' tribute to Michelangelo is a foam statue sprayed with gaudy gold paint.

The neon signs from Las Vegas' past find their final resting place at this unusual graveyard.

The best Tiki bar in Las Vegas.

Back in 1952, you could get a mushroom cloud chaser with your atomic cocktail.

These banned cigarette vending machines now sell little pieces of pocket-sized art.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

Located in the thermoelectric factory that once powered the entire city, this Portuguese museum is shockingly fascinating.

A jaw-dropping "megalibrary" that turns book-browsing into a geometric adventure.

One of the smallest bookstores on the planet.

The best place in the world to buy tinned fish.

Legacy of the earthquake that nearly wiped Lisbon off the face of the Earth.

The world's oldest bookshop still in operation.

One of the most beautiful bookstores in the world hides a neo-Gothic interior behind an art nouveau facade.

A hidden three-foot-wide house separates these two regal churches.

A science fiction-inspired apartment building designed by a famous Spanish architect.

Gaze upon chocolate sculptures depicting everything from chariot races to Gaudí's famous church at this shrine to sweets.

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

A beautiful but toxic fountain of mercury.

This cafe offers a curated collection of treats and tipples made by monks and nuns.