The gutted remains of this Estonian mansion are a monument to a tragic love.

Abandoned castle was once a grand example of Russian privilege, built exclusively to win a frivolous bet between noblemen.

An abandoned castle owned and ignored by Masons carries a cursed history.

The world's brightest bioluminescent bay.

The world's second largest single-dish radio telescope, once used to contact E.T.

This limestone cave offers an incredible view of the Río Grande de Arecibo valley.

This once-forgotten oasis in the middle of Lisbon was first created over a century ago quite by accident.

This unchanged Victorian park is rumored to have been the inspiration behind Peter Pan's Neverland.

Explore the evolution of printing technology, from cuneiform to Kindle.

A majestic lion statue guards this Parisian botanical garden, and feeds on an unsettling item.

Fonts are born and bred here at the oldest letterpress type foundry in the United States.

A 16th-century monastery boasts a lush array of plants native to Mexico’s most biodiverse region.

This palatial botanical garden is home to one of the largest pipe organs ever installed in a private residence, and a piece of Wood's cycad.

This medieval Italian town is a sheer (and beautiful) cliffside defense.

Nobles would stage mock naval battles on this large lake at the Royal Palace of Caserta.

A little-known park with unusual, half-ruined structures and a mystical energy.

A little slice of Japan and its aesthetics in London's Holland Park.

The Victorian-era greenhouse is stuffed with tropical plants, and open 365 days a year.

Admire endangered plants in a verdant garden that looks straight out of a Monet painting.

Over two centuries old and counting, Madrid's massive botanical garden contains one of Europe's only desert environments.

A lush indoor jungle fills this bustling Madrid transportation hub.

This striking royal residence is the largest Renaissance-style castle in Scandinavia.

This “living museum” at UCLA exhibits thousands of plant species from all over the world.

The oldest surviving botanic garden in the United States.