- Tiouli tunnel
- Tiouli tunnel
- Elbtunnel, southern building
- Elbtunnel
- Elbtunnel
- Elbtunnel
- Elbtunnel
- Elbtunnel
- Elbtunnel, northern building
- Levkovtsi
- Levkovtsi
- Levkovtsi
- Levkovtsi
- Bobadilla - Algeciras line
- Torralba
- Canfranc
- Canfranc
- Canfranc
- Canfranc
- Guadiana Railway
- Guadiana Railway
- Chanza Canal
- Pomarão
- Pomarão