This beautiful park on the outskirts of Rome protects the ruins of two colossal ancient aqueducts.

The medieval-looking hammer beam teak roof may be a Victorian vanity, but it's still absolutely magnificent.

The sign at the garden gate reads: “These Plants Can Kill.”

This enormous secondhand bookstore inside a Victorian train station sparked the "Keep Calm and Carry On" craze.

This iconic 1,000-year-old medieval castle is a favorite of the film industry, most notably as the location for Hogwarts in Harry Potter.

One of Edinburgh's oldest pubs hides a 19th-century skittles alley in the back.

An iconic red telephone box turned tiny art gallery.

The 20th-century chapel’s intricate woodwork includes amazing details, most notably angels playing bagpipes.

Neon artworks light up this dark Edinburgh tunnel.

A beautiful Greco-Roman structure houses a well once believed to have healing powers.

Accessible only at low tide, the deserted island is dotted with World War II ruins.

A 18th century graveyard and its astonishing cortege of macabre iconography.

One of the oldest scientific gardens in Britain, containing more than 13,302 plant species in its core collection.

Under the right circumstances, this waterfall in Yosemite briefly turns a luminescent fiery orange.

Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.

The world’s oldest active sailing ship.

Built for an exposition in 1915, these horticultural displays have stood the test of time.

What began as an illegal art installation has become a symbol for unity, ocean awareness, and coastline preservation.

Natural rock water slides hidden in the remote forests of northern Idaho.

These old doors are covered in the signatures of Rehoboth Beach artists dating back to the 1930s.

The only natural lake in the world that drains into both the Atlantic and Pacific Oceans.

This Yellowstone geyser may not shoot as high as the nearby Old Faithful, but it erupts for considerably longer.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.