This striking arch, one of the first architectural elements constructed in Prospect Park, was recently restored to its original glory.

A one-ton statue of Steve Rogers beautifies the entry to a Brooklyn Bed, Bath & Beyond.

One of the few Glatt kosher delis in the United States is a cornerstone of its Hasidic neighborhood.

Just your average Marie Antoinette–themed speakeasy in an abandoned 19th-century subway tunnel.

Tucked in a nondescript downtown Brooklyn mall is a bar containing a remarkable turn of the century anatomical wax collection last seen in 1920s Berlin.

This eye-popping Icelandic crater lake is surrounded by red volcanic rock.

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.

This fantastical waterfall is hidden in a cave located in a cracked cliff.

Rising from the sea like a stone monster.

An ancient and majestic fortress that played an integral role in Portugal's road to independence.

The verdant mossy ruins of a Franciscan monastery lie in the remote Sintra hills awaiting exploration.

Abandoned for decades, trains still pass through the now-restored remains of one of Madrid's first metro stations.

Madrid's romantically ornate crystal palace has been offering shelter to plants and art for over a century.

An ancient Egyptian temple in the middle of Madrid, Spain.

Ring the bell to enter a bar that looks equal parts museum and old curiosity shop.

This charming candle shop has been in business since 1789.

A once grand hotel now sits eerily abandoned in the Catalan countryside outside Barcelona.

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

Remains of the lost church hide beneath this Spanish Parliament building.

A subterranean relic of the Spanish Civil War hides below this picturesque park.

The oldest restaurant in the world is this old-world Spanish eatery, still known for its suckling pig.

Bask in the 19th century grandeur of an eccentric Freemason millionaire's private gardens.

An unusual stroll through gentlemen's erotica demonstrates that pornography is timeless.

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