The largest ice cave in the world is thought to be the entrance to hell according to Austrian legend.

This small 16th-century church in Athens is almost entirely surrounded by a modern building.

A man's head is enshrined beneath a statue near the first building constructed for the modern Olympic Games.

The site where the summer solstice helped ancient Greeks sync the lunar and solar calendars.

A Byzantine-era church hidden in a wooded area below the Acropolis.

Gladiators once walked this ancient, subterranean passage.

A closer look at this somewhat faded hotel by the Corinth Canal reveals the architectural undertones of a genius.

These caves secretly held national treasures during World War II.

An ancient octagonal weather station named for the eight Greek gods of wind.

When construction began on this hotel, developers were surprised to find the ruins of an ancient civilization.

The Cycladic architecture makes this Athens neighborhood feel like an island paradise hidden in the shadow of the Acropolis.

One of the most exquisite Lycian hilltop citadels in Turkey.

A Turkish ghost town abandoned in a population exchange with Greece.

The 10,000 Torii shrine.

The sound of swaying stalks in this stunning grove has been named a governmentally recognized sound.

A beautiful bamboo trail tucked in this famous Japanese shrine.

This massive wooden building contains a giant Buddha, healing pillars, and tame deer wandering the grounds.

Devoted Buddhists can earn enlightenment in the next life by crawling through this symbolic nostril.

An eerie reminder to the horrors of World War II.

Peace Park and the Atomic Bomb Dome.

A plaque marks the site directly below the mid-air detonation of the atomic bomb over Hiroshima.

This Japanese national treasure was originally built in 593.

An ingenious solution to a tricky engineering problem, this spiraling bridge takes drivers for a dizzying spin.

A metal forest of peas pays tribute to the founding father of genetics.