Related to astronomical observatory structures

Great Wall of China view

1920 × 1200

Taj Mahal in black and white

2400 × 1350

Spiral staircase in Rome

1280 × 960

Taj Mahal in black and white

1280 × 800

Topkapi Palace Gate

1248 × 879

A historic fort in India

1024 × 634

Blue Mosque under cloudy sky

1280 × 852

Plaza de España in Seville

1600 × 1200

Great Wall of China on a misty day

1280 × 853

Spiral staircase in Rome

1600 × 1200

Parthenon at sunset

3072 × 2048

Plaza de España in Seville

2048 × 1536

Plaza de España in Seville

3072 × 2048

Humayun's Tomb in Delhi

1024 × 768

Plaza de España in Seville

1600 × 1200

Traditional Korean gate entrance

3008 × 2000

Great Wall of China view

1920 × 1200

Potala Palace in Lhasa

2816 × 2112

ancient fortress by a green lake

1280 × 1024

St. Mark's Basilica in Venice

1680 × 1050

Temple of Hatshepsut

1280 × 960

Mountain peak observatory

2272 × 1704

Roman Bathhouse Interior — Brown

3840 × 1200

York Castle

1344 × 900