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

At Washington's Dulles Airport is a satellite museum (no pun intended) with three quarters of a million square feet of aircraft history.

The Habsburgs' royal collections of art and wonders.

Built by prisoners of war, the largest small-scale model ever built includes eight miles of tiny streams that now sit abandoned.

148 feet long and in the middle of a verdant forest.

A wonderful display of arts and crafts handmade by local artisans in the Southern Appalachians.

This modern castle sat empty for decades before a fire inspired its builders to complete its luxury halls.

The world's longest known cave system.

These fossilized remains of an ancient saber-toothed cat inspired the mascot of Nashville's NHL team.

At 135 years old and counting, this historic print shop is heaven for poster nerds and music buffs.

This Tennessee museum is dedicated to a tragic railroad hero who inspired the famous ballad that bears his name.

This park offers a variety of sights and activities including trail rides and buffalo sightings.

Walk the whole Mississippi River!

Every day a troupe of pampered water fowl walk the red carpet to their favorite fountain.

Home to drunken tower-climbing goats... seriously.

Elvis's own personal tropical hideaway.

A reclusive Memphis neighborhood is home to decades worth of misunderstood Masonic folk art.

This two-room shotgun shack in Tupelo is the birthplace of a King.

Constructed from bricks salvaged from a former dormitory destroyed in a fire.

The mirrored section takes the shape of Hebrew characters when viewed from above.

One of the last Depression-era bandshells still standing was the site of Elvis Presley’s first live concert.

Gnarled canopies of pink and purple wildflowers arch over the trail to the summit.

This ancient Roman bridge and aqueduct still stands as a wonder of classical construction.

One part local history, 99 parts gruesome haunted house.