This ancient cave temple complex is the largest and best-preserved temple complex in Sri Lanka.

This sacred fig tree with a link to the Buddha is one of the oldest human-planted trees in the world.

This peaceful, round shrine in the middle of the Sri Lankan jungle acts as a beacon of peace.

This elaborate temple was built around one of the Buddha's teeth.

Seven beautiful 1,000-year-old rock-cut Buddhist statues.

Pettah's beautiful floating market was once a stinky canal in a sketchy industrial area.

An ancient stone fortress considered by many to be the eighth wonder of the world.

This winding road of 318 curves is a must-visit for (careful) motorcycle and sports car enthusiasts.

A recreation of the doomed ocean liner in the middle of the Smoky Mountains.

Over 200 people were buried here with only a small stone to mark their final resting place.

Paths are maintained, but trees have taken over plots.

South Carolina's last remaining slavery auction house is now a museum devoted to its own tragic history.

I-95's Tijuana-style celebration of kitsch at the Carolina border.

A mailbox that saved a nature reserve.

The uniquely-designed winter home and sculpture studio of Anna and Archer Huntington.

The alley connecting two of country music’s most historic venues has a rich history of its own.

One man has spent decades faithfully constructing this unique brick and cinderblock castle.

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

This historic train station has been converted to a locomotive themed hotel.

This Memphis recording studio launched the careers of Jerry Lee Lewis, Johnny Cash, and Elvis Presley.

A Memphis park where you can walk the whole Mississippi River in one go.

This former maximum-security prison is creepy, sobering, and supposedly haunted.

For two weeks every June, fireflies in the Smoky Mountains perform an astonishing light show.

Wild lights and sound effects turn a walk through some caves into an eye-popping 1960s tourist attraction.