Concrete bunker with green roof

1600 × 1200

Bunker Hill Monument on a sunny day

1200 × 1600

Concrete bunker in forest

2448 × 1377

Ancient Roman Theater — Brown, Historical

1600 × 1200

Roman Amphitheater — Blue, Dramatic, Night

2560 × 1600

Sculpted stone gateway in a park

1600 × 1000

Ancient Stone Ruins — Gray, Ruined, Afternoon

3072 × 1728

Ancient Stone Ruins — Beige, Serene, Afternoon

2816 × 2112

Castle with Round Tower — Brown

1000 × 625

historic stone fortification

3664 × 2748

Roman Aqueduct in Segovia — Gray, Historical

2816 × 2112

Red Wooden Gate — Brown

1920 × 1200