Puffin enthusiasts flock to Europe's largest seabird cliff, which over one million birds call home.

The vertical-axis windmills of ancient Persia have been grinding flour for 1,000 years and counting.

A 1,500-year-old, 3-story subterranean city where ancient Persians took refuge in times of war.

The sacred shrine of the Yazidis.

Thousands of acres of beautiful wild landscape in the Great Basin.

Perhaps the only prehistoric monument with its very own public bus stop.

These boots are made for selfies.

Overshadowed by other, more famous Maltese catacombs, this ancient burial chamber has one of the best examples of a ritual agape table.

The dress young Pierce wore prior to his breeching ceremony in the early 1800s is now on display for all to see.

Iran's colorful terraces are a rare geological masterpiece.

The controversial urban planner who designed Washington, D.C., was buried in Maryland, and can presently be found in Virginia.

The rogue roots are gradually consuming some of the historic marble grave markers.

Conveniently located within binocular range of a nuclear bunker, the "summer camp" area was a painfully obvious spy house.

The whimsical legacy of a Canadian artist.

The world's largest pineapple building honors Bathurst's favorite fruit.

The cardinal directions, set in stone.

A logging-themed roadside restaurant surrounded by museum-quality machinery and artifacts from the industry's heyday.

The first park built over a freeway is a brutalist masterwork.

An abandoned resort in North Macedonia is a relic from the Communist Party of Yugoslavia.

A tiny red pebble marks what may be the quietest outdoor spot in the United States.

A succinct inscription commemorates the ebb and flow of a woman's life.

It would be easy to walk past this unusual piece of art and have no idea it pays tribute to the odd life of a real chicken.

An imposing Omani fortress surrounded by date palm trees.

The only visible reminders of an elaborate engineering project that kept the tower from reaching the tipping point.